ASL TT13/E/35K 13-Watt Twin-Tube 4-Pin Electronic Ballast Compact Fluorescent Bulb, Neutral White Commercial-Grade Tri-Phosphor Powder coating provides a Color Rendering Index (CRI) of 82 -- an object's colors are not distorted when viewed under this light. Instant Start -- Non-Amalgam based lamp. Perfect for use with motion sensors or other occupancy sensors. Long Life -- Average rated lamp life of 10,000 hours. Suitable for use with dimmable electronic ballast.