Featured product
Spider Farmer SF-1000
Spider Farmer
Best for: 2×2 / 3×3 leafy green and herb grows
Best footprint
~2×2 to light 3×3 leafy
Spectrum
Full-spectrum white LED
Control
Dimmer for stage control
Leafy PPFD goal
Often 200–400 µmol/m²/s
Pros
- + Strong efficiency versus older blurple lights
- + Dimmable control from seedling to harvest
- + Even enough footprint for small tents and racks
- + Full spectrum makes scouting pests easier
Cons
- − May need multiple fixtures for wide canopies
- − Passive cooling still adds heat to small closets
- − Fruiting tomatoes may want more total PPF
How we evaluate this category
Lights are judged on usable PPFD for leafy targets, spectrum practicality, dimming, heat behavior in small spaces, and value — not maximum marketing “coverage” claims.
Always map intensity to crop: lettuce burns under tomato settings.
What grow light for leafy greens actually needs
Lettuce and similar greens often thrive around 200–400 µmol/m²/s PPFD — far less than fruiting tomatoes. Cranking a powerful LED to maximum over butterhead is a tip-burn machine. Dimmer control is crop protection, not a luxury.
Use DLI thinking: PPFD × hours × 0.0036. Many leafy crops sit near ~12–17 mol/m²/day. Pair this review with our free DLI calculator and grow light coverage/distance planner.
Best grow light for leafy greens by tent size
Shelf / 2-foot bars: low-profile LED bars for multi-tier herbs and microgreens.
~2×2 leafy tent: an SF-1000-class dimmable panel is a common sweet spot at partial power.
~3×3 leafy canopy: one efficient panel at sensible height, or two overlapping bars for even corners — measure edges, not just the hotspot.
Hang distance / PPFD table for lettuce
Start higher than you think, then lower until plants look compact without bleaching. A practical leafy band is often ~12–24+ inches depending on wattage and dimmer setting — manufacturer charts beat guesswork.
If leaves taco, bleach, or burn tips under strong white LEDs, raise the fixture or dim 20–40%. If plants stretch, increase intensity or photoperiod modestly before dumping more nutrients.
Why SF-1000-class lights fit greens
Efficient diodes, usable dimming, and a footprint that matches small tents make this class a common home hydroponics pick. Full-spectrum white light also makes it easier to see pests and deficiency colors than monochrome blurple.
Hang height and uniformity tips
Start from manufacturer charts, then watch plants. Stretching means raise intensity or lower the light; bleaching means dim or raise. Measure center and corners — a hot center with dark corners yields uneven heads.
Add gentle airflow under LEDs. Still air plus high PPFD is a classic lettuce tip-burn combo.
Alternatives
Smaller bar lights for shelves: Better for multi-tier herbs than a single panel.
Higher-PPF fixtures: Choose these when you move into peppers/tomatoes.
Verdict
A reliable full-spectrum LED that can hit leafy-green PPFD targets without the electric bill of legacy blurple fixtures. Dim for seedlings; verify corners, not just the hotspot.
Frequently asked questions
What grow light for leafy greens should I buy?
A dimmable full-spectrum LED sized for your footprint. SF-1000-class panels suit many 2×2–3×3 leafy tents; shelf bars suit multi-tier herbs. Target ~200–400 PPFD, not tomato settings.
How far should an LED grow light be from lettuce?
Follow the leafy-green chart for your model, then adjust to roughly 200–400 PPFD without bleaching. When unsure, start higher and lower gradually.
Can one SF-1000 flower tomatoes?
It can run small fruiting plants in a tight footprint, but serious tomato production usually wants more total photon output and careful training.
Are blurple lights okay for hydroponics?
They can grow plants, but modern full-spectrum LEDs are easier to live under and usually more efficient per dollar today.