Philips 21139-1 - 35 Watt - T3.5 - Pulse Start - Metal Halide Unprotected Arc Tube - 3000K - ANSI C179/E - PGJ5 Base - Universal Burn - CDM 35/TM/930Ideal for new installations and facility upgrades, the Philips 21139 1 MasterColor pulse start metal halide bulb features an excellent lumen maintenance of 3000 initial lumens and significant energy savings. The 35 watt lamp creates a bright atmosphere with a color matched for halogen bulbs. With an unprotected arc tube and universal burn position, this pulse start lamp is compatible with enclosed fixtures only. Mercury containing products sold into