• Natural daylight balanced color temperature of 5500K with 1300 Lumens output, 120V; CRI of 91; great for reading, for various tasks and also as a grow light.
• This is a large bulb that might not fit standard household lamps, see diagram above; Dimensions: length: 6.5 inches; width (diameter): 2.5 inches; width (diameter) of socket: 1 inch.; fits all medium-base E27/E26 sockets.
• Generates very little heat; all ALZO Joyous light bulbs are flicker-free.
• Energy saving, uses about 1/4 of the energy of a comparable Tungsten bulb, with about 10,000 hours bulb life.
• Defective or damaged bulbs will be replaced at no cost in the first 30 days..

Generates very little heat All ALZO Joyous Light® bulbs are flicker-free Energy-saving, uses about 1/4 of the energy of a comparable Tungsten bulb About 10,000 hours bulb life This 27W compact fluorescent light bulb is very bright at 5500K color temperature with 1300 Lumens output, 120V. The Joyous Light® bulb is daylight balanced, i.e., its brightness is equal or very close to daylight. Customers praise the bulb's brightness that makes reading texts easy on the eyes. It is also great as a task light or grow light bulb. This is an energy-saving bulb with about 10,000 hours bulb life. Fits all medium-base E27/E26 sockets. Dimensions: Length: 6.5 inches; Width (Diameter): 2.5 inches; Length socket base to top of ballast: 3 inches; Width (diameter) of socket: 1 inch. Important: ALZO CFL bulb life is based on the bulb in an open air upright orientation. When ALZO bulbs are installed in fixtures that lack adequate ventilation, the life of the bulb will be reduced. If an ALZO CFL bulb is installed in an overhead recessed light fixture with the bulb glass below the base, the life of the bulb will be greatly reduced. Is a photography light bulb different from a general use bulb? More Features Generates very little heat All ALZO Joyous light bulbs are flicker-free Energy saving, uses about 1/4 of the energy of a comparable Tungsten bulb About 10,000 hours bulb life Specifications Wattage (Energy Used): 27 watt Lumens (Brightness): 1300 Color Temperature (Appearance): 5500K Voltage: 117 UV-A @1m: 0.001mw/cm2 UV-B @1m: * >0.000uw/cm2; *Not within the range of our meter. Note:UV-A from sunlight midday = 5-10mw/cm2 Frame Rate: ALZO CFL and LED light bulbs can be used at frame rates up to 1000 fps without any flicker; they are true continuous light sources. Bulb Life: (based on 3 hrs./day) 9.1 yrs Estimated Yearly Energy Cost: (based on 3 hrs./day and $0.11/kWh; cost depends on rates and use) $3.25 Dimensions: Length: 6.5 inches; diameter: 2.5 inches Disposal: Contains Mercury / For more on clean up and safe disposal, visit epa.gov/cfl FAQ ALZO Compact Fluorescent Light Bulbs FAQ What is CRI Color Rendering Index? Lumens and Lux, Definition of Light Measurement Guide Full Spectrum Lighting Guide Light Therapy Might Help People With Bipolar Depression