Indoor lighting arrangement employing high intensity discharge l

Details Indoor lighting arrangement employing high intensity discharge l Indoor lighting arrangement employing high intensity discharge l

1984-08-03

1986-02-11

Lazarus, Ira S.

Illumination

Plural light sources

Particular wavelength

362 1, F21V 900

Patent

active

045702098

ABSTRACT:
An indoor lighting arrangement employing a combination of high pressure sodium (HPS) light sources, which produce a yellowish light, and mercury vapor or metal halide light sources, which produce a whiter light. Where the distance between the floor and the plane containing the light sources is at least fifteen feet, the HPS and whiter light sources are mounted in a checkerboard pattern so that the yellow and white illumination which they produce is completely mixed at normal eye level. When lower ceiling heights are involved, lighting fixtures are used which each contain both an HPS lamp and a whiter light lamp.

REFERENCES:
patent: 1957404 (1934-05-01), Beck
patent: 2725461 (1955-11-01), Amour
patent: 2831966 (1958-04-01), Porteous
patent: 3093319 (1963-06-01), Gamain
patent: 3201576 (1965-08-01), Scott et al.
patent: 4091441 (1978-05-01), Ott
patent: 4120026 (1978-10-01), Tsuchihashi et al.

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