GE ConstantColor CMH lamps are the ultimate light source for all applications. GE's CMH lamps use an advanced three-piece arc tube design developed through rigorous Six Sigma processes. With the three-piece arc tube, GE CMH Lamps have up to a 96% survival rate at 4,000 hours, which means greater reliability! Their crisp, white halogen-like light provides dramatic accents and highlights, with excellent color rendering and improved spectral distribution with enriched reds.