California LightWorks SolarSystem 550 UVB LED Grow Light | 400W, 4x4 ft

California LightWorks UVB-Supplemented LED Grow Light at 400W

The SolarSystem 550 UVB pulls up to 400W from a 90–277V auto-voltage driver. It delivers 888 µmol/s PPF at 2.23 µmol/J across a 4×4 bloom canopy, or up to 6×6 ft for veg. Three independent dimming channels run 0–100% on a programmable schedule. The UVB-supplemented diode mix is tuned for finishing-stage trichome and resin response. The 13 lb fixture in an 18 × 8.5 × 4 in chassis fits sealed rooms and tents.

Why a UVB Supplement Earns Its Spot in the Final Stretch

UVB delivers diminishing returns on flux but hits resin and flavonoid response in a way 660 nm reds alone can't. Growers typically run the UVB LED grow light at 70–80% during the final weeks of bloom. Ramp the third channel up gradually to avoid stressing veg-stage plants. The RJ11 data port lets a single controller drive multiple SolarSystem fixtures on the same schedule. Active thermal management holds diode temps in spec. the fixture package ships with the controller and mounting hardware required to deploy.

Key Features

• 3-Channel Programmable Spectrum: Independent 0–100% dimming for red/IR, white, and blue/UVB lets the 550 UVB run propagation through finishing on one schedule.
• 888 µmol/s PPF at 2.23 µmol/J: Solid finishing-stage flux for a 4×4 bloom canopy with the UVB channel tuned for resin response.
• UVB Channel for Late Flower: Targeted UVB diode mix supports trichome and flavonoid development during the last two to three weeks of bloom.
• 13 lb Compact Chassis: 18 × 8.5 × 4 in form factor fits low-ceiling tents and rooms where larger fixtures don't clear.
• RJ11 Daisy-Chain: One controller drives an unlimited number of SolarSystem fixtures on the same program, simple to scale across a flower room.
• Active Thermal Management: Internal cooling holds diode temps across 0–107°F so the 50,000-hour life rating actually pays off in sealed rooms.

Technical Specifications