Top Sale Quantum Board Led Grow Light For Agriculture Project Advantages:♦ High quality steel housing as heat sink, integrates with fan as a whole heat dissipation system.♦ Designed for optimal full spectrum which provides plants Veg and Bloom options. ♦Total power comparing to traditional 250 or 600 watt HPS/MH. ♦Certified with the CE/ETL Mark.Specification:ModelVG504A-270WVG504B-270WPower270W270WRated Main Voltage120-240V120-240VInput Frequency50/60HZ50/60HZEfficacy2.2 umo/j2.2 umo/jLight output594 umol/s594 umol/sPower Factor>0.95>0.95Lifeime50,000hrs50,000hrsHousing colorWhite/BlackWhite/BlackSpectrumFull spectrumVEG&BLOOMProduct picturesUser Manual:  1.Indoor and green house use only. 2.Don't touch or move when the light working. 3.Do not use the horticulture LED grow light in a dripping water or anywhere where they will get wet, water and electricity can be a dangerous mixture. 4.The working environment for LED grow light is minus 20 to positive 40 Celsius,45%RH~90%RH. 5.To protect the light,please cut off the power in the thunderstorm weather. 6. Don't block the air inlet and outlet, keep air convection, Don't look at the led grow light directly while it's on. Suggestions: 1.Clean the dust inside every 6 months to ensure the good heat dissipation and long life time. 2.Don’t keep too short distance to the plant canopy to avert leaves bleaching. 3.Highly hang the lamp will weaken the energy and affect the growth cycle of the plants,so the lamp should not be hang  too high. 4.While taking care of the plants, please spray the leaves and branches 2-3 times everyday, to ensure the plants do not wrinkle a wither, and have no phenomenon of few fruit, and hard pericarp.