The mogul based bulb has a color rendering index of 65, assuring your operation’s lighting will be bright and direct. The bulb’s elongated shape provides optimum light distribution, with up to 20,000 hours of radiance. The universal burning position lets you use this bulb in virtually any fixture, and a 4000 Kelvins temperature rating ensures a cool. Reviews There are no reviews yet. Be the first to review “Satco 400 W ED37 HID Bulb 20,000 lm Natural Light Metal Halide 1 pk” Cancel replyYour email address will not be published. Required fields are marked *Your rating * Rate… Perfect Good Average Not that bad Very poor Your review *Name * Email * Save my name, email, and website in this browser for the next time I comment.