Excellent 3W LEDs, higher efficiency. Use isolated power supplies as the UL standard, work with low voltage, less than 45V DC. Unique design in housing, no greenhouse effect inside of the LED grow light, others has. Aluminum front housing, better thermal dissipation, lower tempreture, more whisper quiet. with Optical-lenses, deeper penetration, higher PAR Value. More safe without glass, no glue design, easy for repairing. Intelligence monitor system ensure the whole LED grow light to work all the time Smaller housing and higher actual draw compared to other LED grow light rated at the same power. Case colours: Red, White, Black. Surface colours: Silver, Red, Blue. Ventilator colours: Red, White, Black. Two switches, two power cords, the Blue and White spectrum can be controlled separately. 3PCS/Box Size: 496x283x85mm. Net weight: 6.25Kg.