TotalGrow High Intensity Top-Light 660W Bar

660W of power at 2.5 or 2.9 μmol/J efficacy for the light intensities your plants need Robust, reliable and streamlined design for simple utilization Side reflector add-on for uniform, efficient edge lighting Full spectrum for exceptional versatility The TotalGrow HI-Top light bar is an ideal, cost-effective, utility-incentive-friendly fit for greenhouse or indoor top-lighting with rugged construction and a narrow-profile body that mounts easily to support structures. Excellent efficacies are maximized by a versatile and highly effective grow spectrum, minimal shadowing, and optional side reflectors for uniform light delivery. Daisy-chain power and dimming control for low cost installation and operation.   Power: 660W Output: BF: 1685 µmol/s || 1865 µmol/s Efficacy: BF: 2.5 µmol/J || HE: 2.9 µmol/J Dimensions: 43" long x 3" tall x 4" wide; 17 lbs Dimming: 0-10V + 12V aux power Daisy-Chain Linking: up 2/4 units on 120V/240V (480V alternative version: up to 8 lights); requires daisy-c