Philips MasterColor Ceramic Metal Halide PAR Lamps offer a range of compact, high-efficiency, ceramic metal halide reflector lamps with a stable color over lifetime and a crisp, sparkling light.They deliver superior, energy-efficient accent lighting with consistent, outstanding color required for retail and architectural applications. MasterColor CDM 35W/830 Med PAR20 FL 1CT. Base Medium: [Single Contact Medium Screw] - Base Information: Nic/Brass [Nickel/Brass Base] - Bulb: PAR20 [PAR 2.5 inch] - Bulb Material: Hard Glass - Bulb Finish: Reflector - Beam Description: Flood [Flood] - Rated Avg Life: 9000 hr - Color Code: 830 [CCT of 3000K] - Color Rendering Index: 75 (min), 81 (nom) Ra8 - Mercury (Hg) Content: 2.8 (max) mg - Picogram per Lumen Hour: 239 p/LuHr.