I have 25w true green bulb lights in all my flower rooms. They have no affect on the plants what so ever. I don't go into my flower room with the light on I run CO² and can't. I can only do my plant maintenance in the dark period. For me it's been this way for many years.

A green filter is not correct it must be a true green bulb.

The plant will not see the color green.
Zandor Reviewed by Zandor on . green light could someone give me a scientific reason why green light effects plants during dark hours of flowering, as the plant cannot photosynthesise under this spectrum. This is just a matter of interest as the rule of thumb is no light during flowering, even green light. But if photosynthesis doesn't occur under green light then how can it effect the plant? :confused: Rating: 5