This 85W Full Spectrum Joyous Light® light bulb creates daylight balanced lighting at 5500K, is energy saving, and has a long life of about 6,000 hours with 4250 Lumens output, 120V; low energy consumption, used for starting plant growth. This is a compact fluorescent light (CFL) bulb that fits all medium-base E27/E26 sockets. Due to its large size (see diagram in image section), this bulb won't fit into regular household lamps, since the lamp harp will be too narrow. Dimensions: Length: 10.5 inches; Width (Diameter): 3.9 inches; Length socket base to top of ballast: 4.5 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?
| Wattage (Energy Used): | 85 watt |
| Lumens (Brightness): | 4250 |
| Color Temperature (Appearance): | 5500K |
| Voltage: | 117 |
| UV-A @1m: | 0.004mw/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. |
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Bulb Life: (based on 3 hrs./day) |
5.5 yrs |
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Estimated Yearly Energy Cost: (based on 3 hrs./day and $0.11/kWh; cost depends on rates and use) |
$10.24 |
| Dimensions: | Length: 10.5 inches; diameter: 3.9 inches |
| Disposal: | Contains Mercury / For more on clean up and safe disposal, visit epa.gov/cfl |
What is CRI Color Rendering Index?
Lumens and Lux, Definition of Light Measurement