Metal halide discharge lamp for plant growing

Details Metal halide discharge lamp for plant growing Metal halide discharge lamp for plant growing

1987-06-24

1989-04-25

Moore, David K.

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

313639, 313642, 313486, 313 25, H01J 1720, H01J 6118, H01J 6304

Patent

active

048251275

ABSTRACT:
A metal halide discharge lamp for use in plant growing is disclosed. The lamp of the present invention includes an outer envelope having an inner surface, the inner surface including thereon a phosphor layer, the phosphor being selected to convert ultraviolet wavelength radiation into radiation having a wavelength from about 710 to about 780 nanometers; and a silica quartz shaped arc tube with central part being expanded including therein a pair of spaced electrodes and a chemical fill, the chemical fill comprising mercury, an inert gas, indium halide, lithium halide, sodium halide, and cesium halide. A preferred phosphor comprises iron-doped lithium aluminate. A most preferred chemical fill includes indium iodide, lithium iodide, sodium iodide, and cesium iodide in a molar ratio 0.6 to 7.4 to 1.3 to 0.4, respectively, mercury, and an inert gas.

REFERENCES:
patent: 3234421 (1966-02-01), Reiling
patent: 3896326 (1975-07-01), Fohl
patent: 3965031 (1976-06-01), Klein et al.
patent: 3979624 (1976-09-01), Liu et al.
patent: 4053805 (1977-10-01), Scholz et al.
patent: 4191662 (1980-03-01), Mathers et al.
patent: 4393331 (1983-07-01), Dobrusskin et al.
patent: 4678960 (1987-07-01), Reiling

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