These UL Listed 55 watt CFL E26 medium base 300 watt equivalent replacement compact fluorescent light bulbs have a color temperature of 2700K and a Color Rendering Index (CRI) of 82. The warm yellowish glow of an incandescent light that you are used to is about 2700-3000 degrees Kelvin (K) and has a CRI of 100. If you like that warmer color of light purchase these 55 Watt medium base 2700K CFL’s.
This spiral cfl (also called a twisty bulb, curly bulb or spring bulb) fits fixtures with the standard E26 medium base socket. They are 3.15 inches wide and 9.64 inches MOL. They incorporate an electronic ballast for Instant On, flicker free operation. These compact fluorescent bulbs are eco friendly lighting products that consume just 55 watts of energy and produce the close equivalent light output of a 300 watt incandescent medium base bulb (3700 lumens).