Growers Choice ROI-FF650 LED Grow Light | 650W, 1,950 µmol/s, 4x4 Flower

Growers Choice 650W Flowering LED Fixture at 3.0 µmol/J

The ROI-FF650 is a 650W flowering LED fixture for the flower room. It pulls 1,950 µmol/s PPF at 3.0 µmol/J on the GC-3K spectrum. The spectrum is tuned for bloom-stage canopy response. The 45 × 44 × 4.2 in chassis weighs 20 lbs. Voltage spans 120V at 5.5A, 240V at 2.75A, 277V at 2.4A, or 480V at 1.37A. Passive cooling, IP66 sealing, DLC listed, and L90 > 54,000 hours rated.

How the 650W Fixture Holds a 4×4 Flower Canopy at 1,950 PPF

650W on a 4×4 flower canopy hits a sweet spot for trichome production. Canopy bleach risk stays low compared to 1,000W draws above the same footprint. Growers typically hang the fixture 6–24 inches above canopy and dim 0–10V across the cycle. A typical bloom run starts at 60% during transition and ramps to 100% by week three. Passive thermal management keeps the airflow path clear.

Key Features

• 1,950 µmol/s PPF at 3.0 µmol/J: Commercial-grade flower-room flux on the GC-3K spectrum tuned for bloom-stage response.
• 650W on 120V / 240V / 277V / 480V: Single SKU spans residential through industrial service — no driver swap when you scale from a 4×4 to a 480V room.
• IP66 Wet-Location Rated: Sealed for sealed-room and high-humidity finishing where top lights see condensate.
• Passive Cooling: Fanless thermal management means no moving parts in the airflow path — less to clean, less to fail in a sealed room.
• 6–24 in Mounting Height: Wide hang-height window covers tight tent ceilings and tall flower rooms with the same fixture.
• L90 > 54,000 Hours: Diode degradation curve holds 90% output past 54,000 hours, paired with the 5-year standard warranty.
• DLC + ETL Listed: Full certification stack for utility rebate eligibility and commercial code compliance.

Technical Specifications