ULTRAVIOLET HEAT LAMPS: Used as a Heat Lamp in the Greenhouse

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin over 7 years ago.

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Use it only if the light, which is toxic to plants, is shielded from them. A68-524 used for varying lengths of time = the wave-length of u.v. is harmful to plants; short periods have no effect; kind of light usable by plants begins at 425 millicrons and u.v. is 400 or less; fluorescent lamps are mercury lamps of a sort, color-corrected for plant growing. A70-55
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