These UL Listed 42 watt, 277 Volt CFL, replacement compact fluorescent light bulbs have a color temperature of 4100K or 5100K and a Color Rendering Index (CRI) of 82. As a reference point, the warm yellowish glow of an incandescent light that you are used to is about 2700-3000 Kelvin (K).
This TCP spring cfl (also called a twisty bulb, curly bulb or spiral bulb) fits fixtures with an E26 medium base socket. They are 2.8 inches wide and 7.0 inches MOL. They are constructed using the NEW amalgam technology which provides cooler operating temperatures for consistent performance in any position. These 277 volt compact fluorescent bulbs are eco-friendly lighting products that consume just 42 watts of energy and produce the close equivalent light output of a 150 watt incandescent medium base bulb (2,800 lumens).
These 277V CFL bulbs are rated for 10,000 hours and they carry a 15 Month Limited Warranty. The minimum starting temperature is -20 degrees Fahrenheit and the maximum operating temperature is 160 degrees Fahrenheit. Do not use this 42 watt medium base CFL in an enclosed or open recessed can or any type of enclosed fixture as using the bulb in this type of application will void the warranty.
Typical applications for CFL light bulbs include high bay, low bay, open fixtures, parking lot, warehouses and garage applications in residential, office, retail, restaurant, school, hospital and hotel/motel locations.