Lighting apparatus and method
US6939023B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Apr 11, 2002 |
| Grant date | Sep 6, 2005 |
| Priority date | — |
| Expiry date | Sep 6, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2103/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting apparatus is provided that includes a bulb housing having a first surface, and a second surface, wherein the first surface is at an angle greater than zero degrees, but less than or equal to forty-five degrees from a second surface, and wherein the second surface is parallel to a plane on which the bulb housing is to be mounted, and a receptacle connected to the first surface. A quad-tube fluorescent bulb is accommodated within the receptacle. When the angle has a value of forty-five degrees, three tubes of the quad-tube fluorescent bulb are exposed and seventy-five percent of the lighting produced by the quad-tube fluorescent bulb is direct light and twenty-five percent of the lighting produced is indirect or reflected light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.