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Whether you’re an experienced gardener or a novice learning how to grow your own plants, grow lights are fantastic resources for your home garden. They can help you jumpstart your seedlings ahead of their ideal planting season, provide fresh herbs during some of the darkest days of the year, or make sure your houseplants thrive all year long.
No matter your goal, light is essential to plant health because “it is a vital component of photosynthesis,” says Jamie Chan and Blas Herrera, who write about all things horticultural for the blog Fog City Gardener.
For this list of the best grow lights, we tested 16 different models (including stand-alone fixtures, light bulbs, hanging options, and more) at our homes across the country for up to a year. We planted seeds and grew three different seedlings under the grow light and three different seedlings under natural lighting to compare the differences. Aside from the lighting, the care and conditions were the same.
Our Top Picks
Best Overall
LBW LED Grow Light
Adjustable stand
Timer and dimmer settings
Full spectrum lighting
Hanging hardware if needed
Not a stylish decor item
Out of all the grow lights we tested, the LBW Grow Light stood out as the most versatile. Thanks to its full-spectrum lighting (380nm to 800nm) and adjustable tripod and gooseneck (adjustable arm), this grow light provides the right amount of light for various stages of plant growth, from seedlings to larger plants.
We were so impressed after our original round of testing with basil, tomato, and spinach seeds, that we moved all of our houseplants–basil, spider, ivy, and other standard green non-flowering house plants and small clippings—under the light during the winter months in Iowa. Some of the plants had shown signs of slowing down for the winter, but moving them under the light allowed them to thrive again.
While you can’t adjust the red, blue, warm, white, and cold white chips individually, we found it easy to change the six brightness settings and set a timer for four-, eight-, or 12-hour intervals on the controller for the entire unit. The light also comes with hardware, so you can hang it from the ceiling if that works better for your needs. Also, note that this isn't a subtle grow light or particularly stylish, so it does stand out.
We've continued to use this light in our basement, mostly to give our houseplants extra lighting (and we've even lent it out to friends growing seedlings in the spring), so we haven't found it to be distracting at all. However, if you do want to put it away when not in use, the tripod is easy to fold and store, and the light doesn’t take up much room. If you find that you need even more lighting, this option is available with two lightheads and with a larger lighthead (or without the timer, for a few dollars less).
Dimensions: 8.7 x 4.9 inches (light), 15 to 48 inches (stand) | Bulb Type: LED | Wattage: Not listed
We planted spinach, tomato, and basil seeds under the LBW LED Grow Light and monitored their growth. PHOTO: The Spruce We monitored the seedling's growth near a window and under the grow light to compare the differences. PHOTO: The Spruce
Best Hanging
Soltech Solutions Aspect Grow Light
Blends into decor
Easy set up
12-hour timer
Bright, natural light
Analog timer isn't as easy to use as digital
Hanging grow lights allow you to save space while providing light for a larger number of plants. But they can be tricky and time-consuming to install, and sometimes, they don’t blend in well with your decor. While testing the Soltech Aspect Grow Light, we found it to be a great hanging option because it’s easy to install and looks like a regular light fixture (including the braided cable), so it blends in even in small spaces (we're using it in a bedroom in New York). It's also easy to adjust as your plants grow.
After over a year of testing, this grow light has made our houseplants flourish, with new branches or blooming flowers. Our plants under the grow light continue to do much better than those receiving only natural light by the window. We love that it provides ample lighting for many of our plants at once. We even brought our Meyer lemon tree in during the winter months, and it's fruiting and doing well.
We originally tested the smaller version of this light—5.8 x 3.8 inches with 2,000 lumens, 20 watts—and were impressed by its performance and the amount of natural-looking light it emitted. We also tested the larger version—7 x 4 inches with 4,000 lumens, 40 watts—and were just as impressed. Both are extremely powerful and provide a nice amount of natural-looking light.
Whether you choose the small or large version, each grow light includes a 15-foot fabric cord, three ceiling hooks, two wall fairleads (Soltech’s cable management accessory), and a swag hook. The cable and fairleads allow you to move the lamp closer or farther away from your plants, depending on the type and growth stage.
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Installing the larger light took us only 10 minutes. However, depending on your experience hanging fixtures and where you are installing it, it may take longer. The light comes with clear instructions, clearly labeled hardware, and instructions on which drill bit to use depending on the surface, which we found helped speed along the process.
Like any other grow light, and especially for any requiring installation, make sure you hang it in an area where you won’t find it distracting. The light doesn’t have any dimming capabilities, and while it provides a nice, effective growing light, it is very bright (although the smaller version is less bright).
It does come with an analog timer (although we swapped that out for a smart plug), which provides light for 12 hours per day. Other than that, it has no other features; you simply plug it in.
Size: 4 x 4 x 7 inches | Type: LED | Wattage: 40 watts
Our tomato seedling grew the quickest under the Soltech Solutions Aspect Large Grow Light. PHOTO: The Spruce We tested how well the light helped us start seedlings by planting three different types of seeds. PHOTO: The Spruce
Best Adjustable-Spectrum
Leoter Grow Light for Indoor Plants
Four flexible lights
Strong, stable clamp
Includes timer with three settings
Can dim and adjust the lighting colors
Doesn't include a stand
If you want to control the type of light at each stage of growth, the Leoter Grow Light is a great choice. We loved how simple this light was to set up, with no assembly required. We found it very easy to clip onto our bookshelf where we were starting our seedlings. The four lights were very easy to bend and adjust, which came in handy when we wanted to cover multiple plants or as our seedlings grew taller.
While this grow light is relatively simple in design—there are no smart features or touch controls—we found the remote on the wire very easy to understand and use. It has a timer for three-, nine-, and 12-hour intervals, and we found them to be very accurate. It also offers 10 different dimmer settings, so you can control the brightness in the room.
Unlike many lights on this list, you can choose between warm (white), red and blue, or red, blue, and warm light (380nm-800nm), depending on the growth stage of the plants. A combination of all three delivers the most positive growth results.
During six months of additional testing, including winter in Connecticut, all of our plants have continued to thrive, looking stronger and taller and producing new leaves compared to our non-grow light plants. We’ve rotated houseplants under the light and continued to grow the tomato seedlings. The clip and flexible arms make this easy, so we can easily move it around to accommodate different plants.
We’ve continued to use the 12-hour timer feature for consistent light, and we love not having to remember to turn it on and off. The only thing we would change about this grow light is the timer, which we wish had the option to stay on a little longer.
Dimensions: 13.46 x 5.71 x 3.27 inches | Bulb Type: LED | Wattage: 80 watts
The Leoter 4 Head Grow Light with Timer was easy to clip onto a bookshelf above our plants. PHOTO: The Spruce The remote was easy to use and had 12 dimmer settings and timer options to customize the lighting. PHOTO: The Spruce
Best Mounted
Soltech Solutions LED Grow Light
Slim and lightweight design
Multiple placement options
Includes timer
Tap on light to control and adjust brightness
Adhesive might not be strong enough for all surfaces
Another space-saving solution we love is the Soltech Solutions Grove LED Grow Light. This versatile grow light has many "hidden" features to help you provide the right amount of light for your seedlings or houseplants while taking up very little space—you can even mount it under an overhead kitchen cabinet.
We found it surprisingly lightweight, and it takes just a few minutes to install on a shelf or wall (or you could place it right onto a shelf). We chose to stick it onto our wall, but it also comes with hardware, so you can screw it onto the wall for a more permanent placement.
The lighting is bright, but you can change the settings by tapping on the bulb. Placing it under a shelf will also help keep the lighting from spilling into the room. You can also rotate the bulb to direct the lighting towards your plants.
We found the timer to be a bit tricky to set up, but it does come with clear instructions (we misplaced them for a bit, but once we found them, they were easy to understand). You do need to set up the timer at the time you want the lighting to start, but you can then program the amount of light you want in 24 hours. If you’d rather just turn it on and off when you want it, you can just tap the bulb, or use the "outlet on" switch on the timer.
We do want to note a few hiccups we had during the installation. Make sure the wall or shelf is smooth, since it may not strongly stick to textured surfaces. We installed it on a slightly textured wall, and it did have a hard time staying put (and did take a little paint down in the process). This proved to be an impromptu durability test, since it fell onto the floor a few times and still worked perfectly with no scratches. Once we installed removable Command Strips, we never had any other issues.
This isn’t an ideal option if you know you will need to move your lighting as the plants grow (unless you don’t install it on the wall), but it’s great for small houseplants or seedlings that you know you will move outside once they grow taller. After six months of use, we noticed new growth in houseplants that had struggled in the past, and our seedlings continued to thrive.
Dimensions: 18 x 1 inches | Bulb Type: LED | Wattage: Not listed
We mounted the Soltech Grove LED Grow Light on our wall with removable strips to keep it secure. PHOTO: The Spruce The grow light's cord can be mounted to the wall to keep it out of the way. PHOTO: The Spruce The grow light was lightweight, slim and easy to mount on the wall. PHOTO: The Spruce
Best for Houseplants
AeroGarden Trio Grow Light
Three lighting settings
Stylish and available in two colors
Touch or app controls
Longer timer
Not designed for larger plants
If you want a stylish fixture that adds to your decor, we love the AeroGarden Trio Grow light. During our six months of testing, we found that it’s perfect for smaller houseplants or seedlings (we used it on seedlings, succulents, and other small plants) because it has three adjustable lamp heads (11 to 17 inches) and blends in perfectly on a bookshelf or table.
It also offers different lighting settings—full-spectrum, white, warm, and cool—that you can choose depending on the plant stage.
We think this is a great grow light for beginners because it took less than three minutes to set up and is easy to use. The timer is automatically set to 10 hours. Just tap the light to change the lighting modes or to turn it off and on.
For more setting options, we downloaded the app to our phone (although it’s not necessary for basic use). There, we could program the light to fade in and out at sunrise and sunset, adjust the timer, and more. And unlike other options on this list, it has a longer timer setting (up to 24 hours), so you can program it for longer cycles if needed. We found the app to be hard to use at first, but once we selected our grow light type, we had no trouble using it.
It does require a little bit of work to make sure the lights hit your plants at the right angle without toppling over, but we found that this just takes a few minutes to adjust. We like how wide a radius of light it produces for such a small grow light, making it good for small spaces but also able to cover a lot of plants at once. But keep in mind that this grow light is designed for plants less than 12 inches tall, so you will need another option for larger plants.
Dimensions: 17 x 11 x 24 inches | Bulb Type: LED | Wattage: 5 watts
We liked the adjustable lights on the AeroGarden Trio Grow Light to accommodate plants as they grow. PHOTO: The Spruce We monitored the temperature and humidity level under the AeroGarden Trio Grow Light to test its performance. PHOTO: The Spruce / Rachel Marek
Best Light Bulb
GE LED Grow Light Bulb
Fits in most lamps
Simple to install
Great for a variety of plants
Makes a humming noise
No special features
For a versatile and affordable option you can easily install into most standard-sized lamps, we love the GE Grow Light LED Indoor Flood Light Bulb. We’ve tested this bulb several times, including during our most recent at-home grow light test, and think it’s a great option for beginners and more experienced indoor gardeners alike.
At 120 volts, it conveniently fits into most standard lamps, which means you don’t have to go out and buy any additional accessories or equipment, and it should blend in pretty well with your other decor.
We originally installed it in a desk lamp that we clamped onto a bookshelf (and could easily adjust to the right distance to the plants), but during our most recent test, we placed it on a flood light socket that we connected to one of our existing grow light stands, so you can place it wherever it meets the needs of your plants.
This light offers an advanced red spectrum, ideal for growing tomatoes, cucumbers, peppers, fruit trees, and flowers. While assembly is as simple as screwing in a lightbulb, the package did come with helpful height recommendations and illustrations for high-light plants (they listed tomatoes, cucumbers, and peppers), as well as low-light plants (leafy greens and herbs). It also recommends using the light 18 hours a day. This bulb does not come with a timer, but we were able to use one of our own.
We tested the GE BR30 LED Grow Light Bulb in several of our existing light fixtures. PHOTO: The Spruce We grew a tomato seedling under the grow light and one with natural light only and compared them. PHOTO: The Spruce We installed the light bulb in an adjustable light fixture that we moved as the seedlings grew. PHOTO: The Spruce Our houseplants grew tall under the grow light, but we can easily adjust the bulb as they grow. PHOTO: The Spruce
We also think it's a great option for an outdoor plant you want to bring indoors during the winter months. When we brought a coleus indoors to overwinter, it did quite well. We also grew cilantro and a cucumber seedling.
Unlike many other grow lights on this list, you will need to replace the bulb in a few months (depending on how often it is used). However, you can buy it in packs of two, so you'll always have a replacement handy. Also, this light is similar to a flood light, so it can be bright but can be pretty lightweight to move (depending on the lamp).
We did notice humming from the lightbulb (when on) during our testing, which only got more distracting as time went on. So we recommend placing this lightbulb in an area where the noise isn't disturbing. However, for a simple way to provide supplemental lighting to one plant or a few small plants, this continues to be a great choice.
Dimensions: 4.06 x 5.94 inches | Type: LED | Wattage: 9 watts
Best Large Capacity
Mars Hydro LED Grow Light
Covers a larger amount of seedlings or plants
Can connect multiple lights together on the same circuit
Brightness settings
Doesn't get too warm
Fixture doesn't blend in well in small spaces
No build-in timer
While testing the Mars Hydro LED Grow Light, we found that it’s a great option for basements and other areas in your home dedicated to growing seedlings and plant care. We love that multiple fixtures (purchased separately) can be connected using the same control panel, also known as daisy chaining. This comes in handy if you have a large number of plants and space.
Installation does require several steps, but it only took us eight minutes to set it up. However, it might take longer, depending on your experience with mounting fixtures and if you are connecting more than one.
We found this grow light to be a "mini sun" in our basement. It is a bright light and has allowed us to grow lettuce, even during the winter, and get a jump start on our seedlings. However, it hasn't been as successful with plants that fruit or flower, perhaps due to the lighting it produces or difficulty with pollination.
For other plants, the light has made a huge difference in their growth compared to those with no grow light. We grew basil and thyme under the light throughout the cold winter months, providing our kitchen with a steady supply of fresh herbs.
This full-spectrum grow light does not come with an internal timer, but we were able to use one of our own to make sure our plants were getting an adequate amount of light. We like that the control panel does have a dimmer, giving you several intensity options. We set this light up in our basement, so we didn’t mind that the light flooded the room.
Setting this light up in a grow tent, cabinet, or under a shelf could help with this, but otherwise, this light wouldn’t be a great option for common areas in your home where you wouldn’t want a bright light. It also doesn’t have a cable management system to keep the cords out of sight (which might not be an issue in a basement or other dedicated space).
Dimensions: 5.5 x 17.3 x 16.9 inches | Bulb Type: LED | Wattage: Not listed
We liked that the Mars Hydro Grow light provided enough light for several seedlings to thrive. PHOTO: The Spruce The control panel has a useful dimmer switch and timer, plus it allows you to connect another light. PHOTO: The Spruce We compared the seedling's growth receiving natural light to those by the Mars light. PHOTO: The Spruce
Best for Seedlings
iGrowtek Grow Light
Compact size
Easy to set up
Can adjust the height of lighting
No additional features
Whether you are starting seedlings indoors for the first time or need a small option for your space, this grow light from iGrowtek will give your plants a good start. At 2 feet long, this grow light setup doesn’t take up much room and fits a larger seeding tray or a few plants. We used it in our basement, but you could fit it on a small table in any room, as long as you don’t mind a bright light.
We installed the light and stand in under five minutes, which included putting the light on the iron stand, adjusting the straps to get the light to the right height, and plugging it in. It does come with instructions, but we found the fixture was intuitive enough to set up without them.
Aside from the stand and adjustable cords, the light doesn’t come with any other features, like a timer or dimmer, so you will have to remember to turn it on and off (or purchase an external timer).
Remember that this setup is only for seedlings or very small plants. During our year of testing, we loved using it for seedlings, but once the plants got taller (the light can only be as high as 6 to 7 inches), we moved them to another grow light or brought them outside when the weather was warmer. However, we did find it easy to store when not in use.
Dimensions: 27.2 x 2.3 x 19.7 inches | Bulb Type: LED | Wattage: 10 watts
It tooks us only five minutes to set up the iGrowtek 2ft Grow Light. PHOTO: The Spruce After planting seeds, we monitored their growth under the grow light. PHOTO: The Spruce We monitored the height, humidity, and temperature of the plants under the grow light. PHOTO: The Spruce
Best Stackable
Gardener’s Supply Company Stack-n-Grow Lights System
Space-saving
Expandable
Great for starting seedlings
Lengthy assembled compared to other grow lights
Harder to adjust lighting as plants grow
If you want to start your garden by planting seeds indoors but have limited horizontal space, the LED Stack-n-Grow Lights System by Gardener’s Supply Company is a great solution. During testing, we loved that this compact, stackable design didn’t take up much floor space and allowed us to keep counters and other surfaces free.
More importantly, our seedlings (tomatoes, peas, peppers, and zucchini) thrived under the full-spectrum lighting which allowed us to get a jumpstart on our midwestern garden ahead of spring.
This unit doesn’t come with a timer or dimmer—depending on placement, the lighting could be a distraction (especially if you add additional shelves and lights), since it brightens the room. We set it up in our basement so it wasn’t an issue, and we also used an external timer to avoid remembering to turn on and off the lights.
While we didn’t find it hard to assemble, it did take the longest on this list, at 35 minutes. The instructions were clear, but this is a larger setup, and taking it out of the packaging and assembling all of the pieces takes longer. We found it tricky to attach the light to the overhead rack, and we needed an extra person to help, but that was the only small hiccup in the process.
Note that it is a bit tricky to adjust the height of the shelves and lighting as your seedlings grow. Our tomato plants started growing into the light, and we wished moving the light was as simple as some of the other options on this list (for example, our best overall, the LBW LED Grow Light, which we just had to move the gooseneck arms of the light). However, if you are starting seedlings, this isn’t something you’ll need to do too often.
Dimensions: 31 x 15.5 x 21 inches (base measurements) | Bulb Type: LED | Wattage: Not listed
We liked that the Gardener's Supply Company LED Stack-n-Grow Lights System was stackable, to utilize a small space. PHOTO: The Spruce Our seedlings under the grow light grew up to 4 inches in six weeks. PHOTO: The Spruce The spinach plant in natural light struggled while the plant under the grow light grew 4 inches. PHOTO: The Spruce
Best for Herbs
Click & Grow The Smart Garden 3
Very simple to set up
Relatively affordable for an all-in-one system
Stylish, compact, and portable
Includes three basil pods, and can accomodate seeds
Water level indicator is subtle and easy to forget about
If you are looking for a grow light to help you grow a few herbs, our favorite is the Click & Grow Smart Garden 3. Since it's self-watering, this all-in-one system keeps your plants thriving with both water and light, with little effort on your part. Plus, it takes up very little counter space.
We love the built-in timer that turns off and on automatically (after 16 hours). The system has two extension arms you can click on when your plants grow. We found them helpful as our plants did grow pretty tall and burned on one occasion (the leaves only browned a bit during the second round of testing). However, even though the lights were powerful, they weren't as distracting as others we tested.
It's also worth noting that during the first testing period, the basil grew very slowly at first (we had the extension arm at first, and the light might have been too high). Once it did grow, it looked healthy and tasted great! You'll also want to keep an eye on the water level since we found it a little subtle at first, and there are no smart features to let you know when it's empty.
Although we wish this garden came with various herbs, instead of three basil pods, the company offers many different options you can purchase. Plus, we love that you can also use your own seeds with the Grow Anything Plant Pods. Overall, we think this is a relatively affordable system, with simple, yet very helpful features.
Dimensions: 8.1 x 5 x 12 inches | Bulb Type: LED | Wattage: Not listed
The Click & Grow The Smart Garden 3 was easy to assemble and comes with a removable water tank. PHOTO: The Spruce Since it's a self-watering system, it does require water refills which are simple to do. PHOTO: The Spruce We liked the adjustable grow light that we can move as the plants grow. PHOTO: The Spruce
Final Verdict
Out of the 16 grow lights we tested, our best overall pick is the LBW LED Grow Light With Stand. This full spectrum grow light impressed us with its versatility and features, which include a timer, dimmer, adjustable stand, and adjustable gooseneck arms. If you want a grow light that looks less utilitarian, and more like a stylish lamp, our favorite is the AeroGarden Trio Grow Light. It's perfect for houseplants or herbs and has three adjustable lamp heads.
Other Options We Tested
Dymond BoostGro LED Grow Light Full Spectrum: Although the Dymond BoostGro LED Grow Light had a lengthy 45-minute setup process, we loved that it provides effective lighting for long, narrow spaces. It doesn't come with a timer, but we were able to hook it up to an external smart timer. We don't recommend this lighting for small spaces where a bright light would be distracting, since there is no dimmer feature. However, if you use the included wires to lower it, or set it up under a shelf (we used double-sided tape), that could help with this issue.
How We Tested the Grow Lights
Over the last few years, we've tested grow lights in the lab and at home for six months to a year. So far, we've tested over 16 different grow lights and 18 different indoor gardens (12 of which included grow lights). Each grow light was evaluated on setup, effectiveness, design, brightness, and value.
Setup: After setting up a timer, we set up each grow light according to the manufacturer's instructions. We noted if the instructions were clear or confusing, how many people were required for assembly, and if we had any other issues along the way. We also noted how easy to the grow light was to use during the testing period, including if the features were intuitive and easy to use and if the grow light could be adjusted as the plants grew.
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Effectiveness: We set up three pots for each grow light. After using the same brand of soil, we added either tomato, basil, or spinach seeds to each pot and labeled each pot accordingly. We set them up in an otherwise dark room away from natural light. We also set up three similar pots but placed them near a window and monitored the seedlings' progress with natural lighting. For both the grow light and natural light plants, we set up a hygrometer to record and monitor the temperature and humidity to make sure it was good. We took care of each plant the same, watering them when needed, and recorded the seedlings' height with a measuring tape after a 3-week and then a 6-week period.
Design: During our testing, we noted the grow light's space usage and used each feature, including internal timers (which we tested for accuracy), dimmers, stands, and smart features.
Brightness: We noted how much light was cast into the room, if it was adjustable, and the color of light. We also noted how much heat was provided by placing our hand underneath the light (note that none of these LED grow lights produced a lot of heat).
Value: After the testing period, we noted what we liked and didn't like about each product and if we felt that the price was reflective of its features.
Long-term testing: We continued testing each product for six more months or more, during the winter months across the country, and added our notes to this list. We used the lights to keep growing the seedlings, or to provide other houseplants with a consistent, longer amount of light than they would get compared to a window. We found that all of the grow light plants continued to thrive and show new growth compared to those only under natural lighting.
What to Look for in a Grow Light
The Right Size for Your Plants and Space
When deciding which size grow light you need, think about how many plants you need to cover and where you intend to put them. If you plan to move your light from place to place or just use it during certain times of the year, opt for something portable that doesn't need to be installed into the ceiling or the wall. Our best overall pick covers several plants and can easily be moved or stored.
If you do want to utilize wall or ceiling space our best hanging pick is a great option that isn't too large and will blend in easily with your decor. However, if you do need a fixture that will cover a larger number of plants and you have a designated space for your plants (without being distracted by bright lights), our best large capacity pick is a great choice. It can also be expanded with multiple lights onto the same control panel.
Wherever you plan to put it, make sure there’s room for it to operate safely and not up against furniture, drapes, or other items.
The Type of Lighting Fixture
There are various types of grow lights to consider, from panels to products that hang overhead or screw into standard light fixtures. The type of plants you have, the amount of existing natural light, and where your plants are located help you narrow down your choices. Typically, hanging lights are larger, while desktop lights are smaller and easy to move around. If you want a complete system, consider indoor herb gardens with a planter, self-watering feature, and built-in light.
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The Ideal Location
“Hanging your lights too low can burn your plants, but hanging them too high can leave them stretching for light, and weak,” says Kansas City-based Melissa Lallo Johnson, host of Art of Gardening, a vlog and podcast that features influential gardeners from around the world. The standard placement recommendation for incandescent grow lights is at least 24 inches from plants.
Since fluorescent and LED lights have lower heat outputs, they can be placed 12 to 18 inches away from plants. Indoor garden systems with extendable lights help ensure that plants do not burn while they grow.
Different plants require different intensities of light, however. If you grow seedlings, Johnson recommends positioning them within 2 to 3 inches of a fluorescent light source or as close to the light as possible without touching it. Hanging or positioning lights directly over plants is the best arrangement because it mimics sunlight and ensures that the entire plant receives adequate light.
The Type of Bulb
All of the options on this list feature LED lights, which tend to be the most popular and most energy-efficient options. They also offer ideal light spectrum ranges. LEDs emit less heat than incandescent bulbs and can last up to 30 times longer. “LED lights are my preferred go-to for lights because they’re energy-efficient and generate little to no heat,” Johnson says.
Fluorescent lights are more energy efficient than incandescent bulbs (but not as much as LED lights), but they tend to be pricier.
Incandescent bulbs are the least expensive option, but they’re also the least energy efficient. They produce fairly high heat, which is not ideal for growing conditions.
The Right Amount of Lighting
The beauty of indoor grow lights is they allow herbs, seeds, houseplants, and flowers to flourish year-round. However, they need the right amount of sunlight and darkness to thrive. Johnson says that for germination and seedlings, you can run lights 16 to 18 hours per day until they are a few inches tall. "As they mature," she adds, "you can slowly reduce to get them on a similar light pattern for spring before you transplant them.”
After some experimenting, you should be able to peg the optimal duration for your specific plant variety. A grow light with a built-in timer makes it easier to control proper light levels, especially if you’re away from home. Most of the grow lights on the list feature built-in timers.
However, you can most likely add an external timer or even a smart timer like we did during testing to those without one. For example, we were able to use an external timer for our best light bulb pick. Johnson suggests that you try to get the light schedule as close as possible to the current sun pattern so your plants are less shocked when transplanted outdoors.
Why Trust The Spruce?
Jenica Currie is an editor for The Spruce and has been with the team since 2020. An avid gardener, she has used both indoor garden systems and grow lights (one of her favorites is the Soltech Solutions Grove LED Grow Light) to jumpstart seedlings, give houseplants extra light, and grow herbs in the winter. She is currently testing The Plant Halo and loves its fun design and more subtle lighting compared to other grow lights she's used in the past.
Our Experts:
- Aaron Steil 999, Consumer Horticulture Extension Specialist, Department of Horticulture, Iowa State University
- Melissa Lallo Johnson, host of Art of Gardening, a vlog and podcast that features influential gardeners from around the world
- Jamie Chan and Blas Herrera, who blogs about things horticultural on Fog City Gardener.