Philips MasterColor CDM-MR16 combines the familiar compact shape of MR16 halogen lamps with the performance of ceramic metal halide MasterColor lamps. Energy savings, up to 2 times less energy consumed than standard 50W halogen MR-16 lamps with comparable light output. Long life, 12,000 hours rated average life, 4 times longer than standard 3000 hour 50W halogen MR16 lamps. Lamp to lamp color consistency.