... re replacing.Manufacturers suggest replacing a 60-watt incandescent with a 13- to 15-watt CFL, a 4:1 ratio. ... to the whiter light of halogen bulbs. At 3500 K to 4100 K, bulbs emit a cool, bright white ... within 200 K to minimize noticeable color differences among bulbs.The accuracy of how colors look under the light ... the CRI, the more accurate the colors. Incandescent bulbs and sunlight score near 100.