Sylvania 400w E39 Base 4000k M59/E Metalarc Metal Halide lamp - SYLVANIA M400/U/ED28 400 watt, E39 mogul base ( 1.53 inch diameter), ED28 shape, metal halide lamp The M400/U/ED28 has a color temperature of 4000K and a average life of 15000 Hour and Approx.
Lumens (initial - horizontal): 32000.