This Replacement for Venture Lighting 875W MS875W/HOR/BT37/PS is a high-output pulse start metal halide HID lamp designed for demanding commercial and industrial lighting applications. Featuring an EP39 base and BT37 glass bulb, it installs easily into compatible fixtures using an M166 ballast system. Delivering approximately 100,000 lumens of 4000K bright white light, this lamp provides extremely powerful, high-intensity illumination ideal for large warehouses, stadiums, manufacturing facilities, and expansive outdoor areas. The horizontal burn (HOR) position ensures proper operation in approved fixtures. Rated for use in enclosed fixtures, this HID replacement bulb offers strong performance, consistent output, and reliable long-life operation in high-demand environments where maximum brightness is required.