OSRAM SYLVANIA HMI 4000W /SE/XS G38 Mogul Bipost base metal halide light bulb HID Bulbs produce high output for their size making them a compact powerful &amp; efficient light source HID Bulbs are used for general lighting, professional lighting fixtures, growing applications HID bulbs put out around 3-5 times greater output (lumens per watt) than traditional halogen bulbs OSRAM bulb, 4000W, Base: G38 Mogul Bi-Post, Rated Life (hours):, Color Temp: 6000K, LM