Plant growth type fluorescent lamp
AssigneeWestinghouse Electric Corp.
InventorRichard Corth
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Abstract
An inexpensive 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 0.8:1:1:1. The enumerated spectral energy distribution provide for a very high plant growth rate with balanced plant growth. Preferably the lamp uses a phosphor blend of about 95% by weight stannous tin activated strontium calcium magnesium orthophosphate and about 5% by weight divalent europium activated strontium chloroapatite.
Claims5
A luminescent discharge lamp to efficiently stimulate balanced plant growth, said lamp comprising a light transmitting envelope, phosphor means as the primary light-generating media coated on the interior surface of said envelope, and means for producing an electrical discharge within said envelope to energize said phosphor means to a light-generating condition, said phosphor means when energized exhibiting a predetermined emission spectrum, and the combined emission of said phosphor means and said discharge which passes through said envelop having a spectral energy distribution such that the energies in the 400-500 nm, 590-640 nm, 640-690 nm, and 690-800 nm bands are at least within about 15% of being within the proportions of 0.8:1:1:1.
Dependencies are inferred from the claim text.