Not a dumb question at all! Yes it is, theoretically possible, just not probable. It is possible to stack too many t5 florescents together over shade-loving orchids, but most people only use two-tube t12 florescents.
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Ross
http://orchids-ross.blogspot.com/
I don't do most Dendros or large, "floofy orchids". For me it's minis (like Angraecoides), Masdies, Paphs, and others that crept in somewhere along the line. See my orchid list for complete collection (usually not current.)
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