Plant growth type fluorescent lamp

Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium

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H01J 162, H01J 6304

Patent

active

043718108

ABSTRACT:
A luminescent discharge lamp to efficiently stimulate balanced undistorted plant growth, the lamp emitting radiation having a spectral energy distribution such that the energy in the 400-500 nanometer (nm), 590-640 nm, 640-690 nm, and 690-800 nm bands are approximately in proportions of 1:2.6:1.3:1.2. The enumerated spectral energy distribution provides for a very high plant growth rate with balanced plant growth. Preferably, the lamp comprises a band-emitting phosphor blend consisting essentially of about 95% by weight stannous tin activated strontium calcium magnesium orthophosphate and about 5% by weight of divalent europium activated strontium chloroapatite and phosphor having a line emission concentrated at 610 nanometer consisting essentially of trivalent europium activated yttrium oxide.

REFERENCES:
patent: 3748517 (1973-07-01), Haft
patent: 4199707 (1980-04-01), Akiyama et al.
patent: 4263530 (1981-04-01), Broekhoven et al.

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