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Prototype of the Berkeley Lab lighting system without the lamp shade. An optical septum separates two CFLs allowing three modes of lighting. |
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- Task lighting for office environments
- Home offices
- Motels and hotels
ADVANTAGES:
- Up to 60% energy savings
- Soft, bright, highly uniform lighting
- Task and ambient lighting in one fixture
- User flexibility
ABSTRACT:
Scientists Michael Siminovitch and Erik Page have invented an energy-efficient, high performance room lighting system that uses two independently controllable and fully dimmable compact fluorescent lamps (CFLs). One lamp’s light is directed downward, illuminating the table or desk. The other CFL directs light up toward the ceiling, providing high quality indirect lighting.
An optical septum separates the two lamps, allowing three modes of lighting: 1) downward only, 2) upward only, or 3) both together. The relationships between the lamps, the septum, and the lamp shade, maximize the efficient distribution of light.
This 110 Watt single fixture system matches the combined luminous output of a 300 Watt halogen and a 150 Watt incandescent lamp at an estimated 60% average energy savings. Substantial savings can be had by turning off overhead lighting in office spaces and using the Berkeley Lab lamp. The "down" light gives the user more than enough flux for most tasks, while the "up" light provides a low-glare ambient light that is ideal for computer environments. The fully dimmable lights enable the user to meet changing needs. The lamp produces a highly uniform light, reducing the hot spots produced by halogen lights and some CFL designs. continued
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