VEVOR 200W LED Grow Light, Samsung 281B+PRO Chips for Indoor Plants Growing, Full Spectrum Dimmable, High Yield Growing Lamp, Daisy Chain Driver, 2x4/3x3 ft Grow Tent VEVOR 200W LED Grow Light, Samsung 281B+PRO Chips for Indoor Plants Growing, Full Spectrum Dimmable, High Yield Growing Lamp, Daisy Chain Driver, 2x4/3x3 ft Grow TentSunlight-like irradiation and a customizable lighting scheme for different growth stages of plants.Up to 30 lamps can be connected in series for group control, suitable for greenhouse planting.There are 5 gears in total, including 4-gear brightness; the EXT/OFF gear is switched to RJ control, allowing adjustment for lights independently.The thickened plate and higher distance design increase the heat dissipation area and provide better ventilation.RJ interface and bulb adopt a dustproof design, making cleaning easier and extending the lifespan.For the four stages of germination, seedling, growth, and flowering, the height and light brightness can be regulated to help the plant grow.Cold White Lamp: 6500K,Waterproof Grade: IP65,Gross Weight: 11.02 lbs / 5 kg,PPE: 2.2-2.3,Red Lamp: 660nm,PPF: ?400umol/S,Number of Lamp Beads: 544,Item Dimensions(L x W x H): 11.81 x 23.62 x 4.72 in / 30 x 60 x 12 cm,Infrared Wavelength: 760nm,Warm White Lamp: 3000K,Humidity: ?95%,PPFD: ?1100umol/m2s (0.6*0.6),Packing Size(L x W x H): 25.59 x 13.78 x 5.51 in / 65 x 35 x 14 cm,Tandem Dimming: 5-segment Dimming,Air Pressure: 90-106 Kpa,Input Voltage: AC 120-277V,Thickness of Light Board: 0.16 in / 4 mm,LED Brand: Samsung 281B,Certification: ETL/CE,Service Life: 50000 hours,Model: 200W PGL-G1,Net Weight: 9.04 lbs / 4.1 kg,Power: 200W 10%,Main Material: Aluminum,Luminous Flux: ?26000lmSpecifications:- Length: 65.0 in, Width: 35.3 in, Height: 15.2 in (description exceeds maximum possible length)