Keeping greenhouse warm with lights
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Old 11-01-2014, 08:24 PM
Raqsharqi Raqsharqi is offline
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Join Date: Oct 2014
Zone: 9b
Location: Tucson, AZ
Posts: 272
Keeping greenhouse warm with lights Female
Default Keeping greenhouse warm with lights

Our overnight temperatures are supposed to drop into the 40s. My 8x8 greenhouse doesn't seem to hold any heat in at all overnight, and I'm afraid the 40s will be bad for my orchids. If I only need a bit of heat, is it safe to use light bulbs to keep things a few degrees warmer? If I do that, do I have to use red or yellow bulbs so that photosensitive plants do go all wacky on me?
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