Special Application Light Bulbs: Type - Photo/Projection Light Bulb; Watts - 28; Bulb - MR-11; Base - GU4; Voltage - 13.8; Operating Position - Any; Length - 1.5 in (38.10 mm); Average Life - hrs - 500; Color Temp - K - 3470; Packaging - 10 (priced per lamp); Additional Information - Dichroic Reflector. Typical Use: Microfilm