How Far Should Grow Lights Be From Plants?
The right distance depends on the light's output and the plant. Here is what grow light makers recommend and how to adjust.
By Ethan Cole
Updated November 2, 2026
There is no single right distance. A 9W bulb and a 70W panel need very different spacing, and a seedling tray needs different light from a snake plant. The best starting point is the maker’s own guidance for your light, then adjust by watching the plant.
Quick Answer
Low-power bulbs and shelf panels: about 6 to 16 inches. Mid-power pendants: 12 to 36 inches depending on the plant. High-output lights: follow the maker’s minimum, often at least 12 inches. Low-light plants can sit much farther away.
What Makers Recommend
| Light | Maker’s guidance |
|---|---|
| GE Grow BR30 bulb (9W) | About 16 in from plants, 12 hours a day |
| GE Grow A19 bulb | About 9 in, 18 hours a day |
| GE Grow Light Fixture (40W) | 6 to 12 in above plants, 18 hours a day |
| Soltech Aspect pendant (36W) | 12 to 24 in over cacti, succulents, citrus; 24 to 36 in over fiddle leaf fig; up to 72 in over snake plant, ZZ, pothos |
| Soltech Vita PAR30 bulb (20W) | 12 to 48 in above the plant |
| Barrina OG11A bulb (11W) | At least 7.87 in (20 cm) above the canopy |
| VALIKIY 40W bulb | At least 1 ft from leaves |
| Hytekgro panels (seedlings) | About 6 to 10 in |
Figures are from each seller’s Amazon listing, checked November 1, 2026.
Aspect Soltech Decor Pendant Grow Light
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Why Distance Changes Everything
Light spreads out as it travels, so the intensity on a leaf falls quickly as you move the light away. That is why a PPFD figure only means something with its distance: Barrina lists 1,497 PPFD at about 4 inches, SANSI 265 PPFD at 12 inches for its 36W bulb.
Seedlings
Seedlings under low-power panels are usually kept close, a few inches to about 10 inches, and the light is raised as they grow. Stretched, pale, leaning seedlings often mean the light is too far or too weak.
Signs a Light Is Too Close
- Bleached, white, or tan patches on the leaves nearest the light
- Crispy edges or curling toward the light’s center
- Soil drying much faster on top
Signs a Light Is Too Far
- Long, thin stems and wide gaps between leaves
- Plants leaning toward the light or a window
- Small new leaves
How to Adjust
Change one thing at a time: move the light 2 to 4 inches, or use the dimmer, then wait a week or two before changing again. Pendants and floor lamps with adjustable heights make this easier; see hanging grow lights and tall plant lights.
Who Should Look Elsewhere
If your light came with its own distance or PPFD chart, follow that over this table. Grow tent fixtures also come with their own hanging-height charts.
Frequently Asked Questions
How far should an LED grow light be from seedlings?
Often a few inches to about 10 inches for low-power panels; Hytekgro suggests 6 to 10 inches. Follow your light’s guide.
Can LED grow lights burn plants?
Yes, high-output lights too close can bleach or scorch leaves. Keep the maker’s minimum distance.
Does distance change with the plant?
Yes. Soltech’s guide ranges from 12 inches for succulents to 72 inches for low-light plants under the same light.
About the author
Ethan Cole leads research and editing at WikiHomeLED, comparing LED lighting for the home through manufacturer specs, manuals, safety listings and owner feedback. Every product is scored against the criteria on our How We Review page, and picks are updated when models change.