Best Commercial LED Grow Light Bars for Vertical Racks
Vertical racks change the light problem: you have 18–36" between tiers, so fixture depth and passive cooling matter more than raw output. Bar-style fixtures solve it — thin profile, even spread, no heatsink eating your canopy height. The fixtures below are the commercial tier: high efficacy, dimmable via 0–10V or controller, and mostly available in 208–277V for multi-fixture rooms. If you're specifying a full room, note the amp draw per circuit before you order.
How to spec bar lights for vertical racks
- Fixture depth determines usable tier height. Under 3" is what you want at 24" tier spacing.
- Efficacy 2.7–3.2 µmol/J at the commercial tier. At scale this is the entire opex argument.
- 208–277V cuts amp draw and lets you land more fixtures per circuit.
- 0–10V dimming / controller compatibility — you'll want room-level control, not per-fixture knobs. See master controllers.
- DLC listing is usually mandatory for utility rebates. Confirm before purchase.
- Passive cooling only. Fans in a sealed commercial room are failure points and contamination risk.
What to skip
- Consumer panels stacked into a rack. The depth and heat make tier spacing unworkable.
- Any fixture without a published PPFD map at your actual tier dimensions.
FAQ
What tier spacing do I need?
18–24" for leafy greens and propagation, 30–36" for flowering crops. Fixture depth comes out of that number.
Do I need 208V or 277V?
Not required, but at 4+ fixtures it materially reduces circuit count and wire gauge.
Can I dim these from one controller?
Most commercial bars support 0–10V dimming, which ties into a room controller. Check per fixture.
Related collections
Commercial Lighting Fixtures · Master Controllers · Best LED Grow Lights for 5x5 Grow Tents · LED Grow Lights
