Circline FC12T9 Fluorescent Bulb, 32 Watt, 12", 91 CRI, 5500K Full Spectrum, Lumens - 1460. Works in any standard 32 Watt Circline fixture, including Naturallighting.com Adaptor Item No's. CAD32 and CAD54. Our best Circline fluorescent bulb for People, Pets, Plants, and color matching (artists, dentists, graphics, photography, and light therapy). Simulates Noon daylight, which is neutral white, and has a high CRI (Color Rendering Index) of 91, Sunlight equals 100. Minimum order 1 (one) bulb. Call for case quantity discounts!