400W MH SunMaster Cool Deluxe Grow Light Bulb - High Efficiency Hydroponic Lighting for Indoor Plants, Greenhouses & Horticulture

SUNMASTER Cool Deluxe Grow Lamps emit light from 5000 to 6500 Kelvin, imitating the natural look of daylight. They are an ideal light source for the seedling and vegetative stages of plant growth, while still emitting a wide spectral distribution. SUNMASTER Cool Deluxe Lamps surpass many other HID sources in PAR (Photosynthetically Active Radiation) watts - the most objective measurement of total light energy available for photosynthesis. This bulb has an initial lumen output of 30,000 and is a universal burning bulb that will work an either a horizontal or vertical system. Comes with one year manufacturer warranty against defects.