Everybody knows that plants need light for photosynthesis, to grow and remain healthy; but do they require (or benefit from) sleep/darkness; or can they be bathed in light 24/7?
I'm not talking about a need to shelter from the weather, UV & IR radiation, etc. Just the visible light spectrum.
For instance: I have some moss growing indoors, under a bright LED light. Is it okay to leave it on constantly, to maximize growth; or should I rotate 12 hour shifts?