Best Grow Lights for Indoor Plants
Four grow lights compared from their makers' specs (a pendant, a hanging bulb, a lamp bulb and shelf bars), the best grow light for a monstera, and how to choose type, spectrum, brightness, distance and hours.
A grow light is the single best fix for the most common houseplant problem: not enough light. If your home has dark rooms, north-facing windows, a windowless bathroom, or short, gloomy winters, a grow light lets you grow almost any plant anywhere - and keep plants thriving through months when natural light fails.
Modern LED grow lights are small, cheap to run, and far better than the harsh purple panels of a few years ago. This guide explains what actually matters when choosing one.
Do You Need a Grow Light?
You probably need a grow light if:
- A room is so dim you’d switch a lamp on to read during the day.
- Your plants are leggy: long, bare stems stretching toward the window.
- Growth has stalled and plants look pale despite good watering and feeding.
- You want to grow light-hungry plants (succulents, herbs, seedlings) in a home without a bright south-facing window.
- Your winters are long and dark and plants decline every year from October to March.
If you have a genuinely bright window and shade-tolerant plants, you may not need one at all - our indoor light checker tool helps you judge how bright a spot really is before you buy.
What Matters When Choosing a Grow Light
1. Type: choose LED
- LED - the modern standard. Energy-efficient, runs cool, long-lasting, and now available in pleasant full-spectrum white. Buy LED.
- Fluorescent - older technology, fine for seedlings and low-light plants, less efficient.
- Incandescent / “grow bulbs” - avoid; they run hot and waste energy.
2. Spectrum: full-spectrum white
Older grow lights were purple-pink (red + blue diodes only). They work, but they make a room look strange. Full-spectrum white LEDs look like ordinary daylight, suit a living room, and grow plants just as well. For houseplants, choose white full-spectrum.
3. Brightness and distance
Brightness (measured in PPFD or, roughly, by wattage) and the distance from the plant work together. A light too far away does little; too close can scorch leaves. As a rule:
- Low-light foliage plants: a modest light, 30-60 cm above the plant.
- Succulents, herbs, high-light plants: a stronger light, closer - 15-30 cm.
Iowa State University Extension gives a similar rule of thumb - LEDs 12 to 24 inches from the foliage in most cases, fluorescent fixtures 6 to 12 inches. Follow the manufacturer’s stated coverage area and hanging height where it gives one.
4. A timer is essential
Plants need a consistent day length. Iowa State’s guidance for home growers is that 12 to 14 hours a day is best, with as little as 10 hours and no more than 16. Put the light on a timer:
- Foliage houseplants: 10-12 hours a day.
- Succulents, herbs, seedlings: 12-16 hours a day.
There is no need to run a grow light round the clock, and some plants need their night to flower or fruit. A cheap plug-in timer or a light with a built-in timer takes care of it.
Four Grow Lights Compared
| Grow light | Type | From the maker | Best for | Links |
|---|---|---|---|---|
| Soltech Aspect Gen 2 | Pendant | 36 W; a pendant light Soltech sells for medium to large plants that need light from above; white or black | One large plant, such as a monstera, in a living room | See on Amazon · Maker’s page |
| Barrina PAR38 25W hanging grow light | Pendant bulb | 25 W and 98 LEDs per light; 120° beam; 16.4 ft hanging cord; built-in timer for 4, 9 or 14 hours, repeating daily; Barrina describes it as suited to large or tall plants | A tall plant, hung above it | See on Amazon · Maker’s page |
| Barrina Orbgrow 11W bulb | Screw-in bulb (E26) | 11 W, 1,460 lumens; dimmer and a 4, 8 or 12 hour timer on the bulb itself; 4000K full spectrum | Turning an ordinary lamp into a grow light | See on Amazon · Maker’s page |
| Barrina T5 10W, 2 ft (4 pack) | LED bars | 5000K full spectrum; each bar has its own switch; up to 16 bars can be linked; tape, clips and cable ties included | A plant shelf or cabinet | See on Amazon · Maker’s page |
How we put this together. Four lights of three common types (pendant, bulb and bars), compared on what each maker states on its own product page, checked on 26 October 2026. We have not grown plants under them side by side, and a maker’s brightness figures are measured at its own distance, so they are not comparable from one brand to another. Mars Hydro’s pages answered with a bot check, so it is missing. There are no prices here: the Amazon link searches for the exact model, and we may earn a commission if you buy through it.
The best grow light for a monstera
A monstera wants bright, indirect light, and in medium light it grows slowly and makes smaller, less-split leaves, as our monstera care guide explains. For a plant that size, Soltech sells its Aspect pendant for medium to large plants that need light from above, and Barrina describes its hanging light as suited to large or tall plants. Hang it at the height the maker gives; Iowa State’s general rule for LEDs is 12 to 24 inches from the leaves, and 12 to 14 hours of light a day, as explained above.
Best Grow Light Types by Situation
For a single plant or a dark corner: clip-on / gooseneck LED
A small clip-on grow light with a flexible neck aims light exactly where you need it - perfect for one struggling plant on a desk or shelf. Cheap and unobtrusive.
For a shelf of plants: LED grow bars / strip lights
Slim LED bars mount under a shelf to light the plants below. Ideal for a plant shelf, an IKEA-style cabinet, or a propagation station. Several can be linked.
For a stylish living room: a grow-light bulb in a normal lamp
Full-spectrum grow bulbs fit a standard lamp socket, so a regular floor or table lamp becomes a grow light with no ugly hardware. The most decor-friendly option for one feature plant.
For seed-starting or a plant collection: a panel light
A larger LED panel hung over a table or rack covers many plants or seed trays at once. The right choice for serious growers and seed-starters.
For a windowless room: any of the above, on a timer
A windowless bathroom or interior room becomes plant-friendly with even a modest LED grow light running 10-12 hours daily, opening up almost any of our houseplant care guides to a dark space.
Signs Your Grow Light Setup Is Working - or Not
- Working: compact new growth, leaves of normal size and colour, plants no longer leaning.
- Light too weak or too far: plants still leggy and pale: move it closer or get a stronger light.
- Light too strong or too close: bleached or scorched patches: raise the light.
- No timer / too many hours: stressed plants: give them a proper 8-14 hour night.
Frequently Asked Questions
Do grow lights really work for houseplants?
Yes. A full-spectrum LED close enough to the plant, and on for enough hours, can stand in for a window - which is what lets you keep plants in dark rooms, windowless spaces, and through dark winters.
Can I use a normal LED bulb as a grow light?
Often, yes. The University of New Hampshire’s extension service says that LED shop lamps will work fine, and that failure under lamps is more often about light quantity (intensity and duration) than about spectrum. What matters is that the lamp is close to the plant and on for long enough.
How many hours a day should a grow light be on?
10-12 hours for foliage houseplants, 12-16 for succulents, herbs, and seedlings - in line with Iowa State’s range of 10 to 16 hours. Use a timer.
Are purple grow lights better than white ones?
Not for a home. Purple lights use red and blue diodes only, which photosynthesis uses well; full-spectrum white LEDs also grow houseplants and look pleasant in a room. See Plant Light Spectrum Explained.
How far should a grow light be from plants?
Roughly 30-60 cm for low-light foliage plants and 15-30 cm for high-light plants like succulents. Follow the manufacturer’s guidance, and raise the light if you see bleaching.
Recommended Gear on Amazon
- Full-spectrum LED grow light - browse current options and reviews on Amazon.
- Grow light with stand - browse current options and reviews on Amazon.
- Smart plug timer - browse current options and reviews on Amazon.
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