If your indoor plants stretch, pale, or stall every winter, they’re telling you they need more light. A good grow light fixes that — but the specs can be baffling. Here’s what actually matters, and the lights we’d buy.
What to Look for in a Grow Light
Spectrum
Full-spectrum (white) LEDs cover the wavelengths most houseplants need and look pleasant in a living room, unlike the old purple “blurple” panels.
PPFD and coverage
Photosynthetic photon flux density tells you how much usable light reaches the leaves. Match the fixture’s coverage area to your plant grouping.
Mounting and timer
Look for adjustable hanging height and a built-in timer so plants get a consistent 12–16 hour day.
Our Picks
Best Overall: Lechuza Grow Bar
Bright, pleasant full-spectrum light with a sturdy adjustable mount and an integrated timer.
Pros
- True full-spectrum white light
- Built-in timer
- Even coverage for a shelf
Cons
- Premium price
Frequently Asked Questions
How many hours a day should grow lights run?
Most houseplants do well with twelve to sixteen hours of light per day on a timer.
Will a grow light replace a sunny window?
A good full-spectrum light can fully sustain most foliage houseplants, even in a windowless room.
