Product details:

Fovitec StudioPRO CFL lights deliver true and crisp colors with a Color Rendering Index (CRI) of 90. StudioPRO bulbs are daylight (white) balanced at 5500K, which allows them to be combined easily with ambient, window light for supplemental lighting. Bulbs are rated to last up to 5+ years for 4+ hours of daily usage, outputting 90% less heat than similar incandescent light bulbs of comparable output.