Coated Light Bulbs: Type - Metal Halide Light Bulb; Watts - 250; Bulb - ED28; Base - Mogul; Voltage - 540; Color - Clear; Color Temperature - 4200K; Color Rendering Index - 65CRI; Length - in - 8.3 in. (208 mm); Average Life - hrs - 10000; Operating Position - Universal; Packaging - 12 (priced per lamp); ANSI Code/Ballast - M58; Initial Lumens - 20800; Manufacturer Series - Multi-Vapor