No, actually 24 hours I heard can help the plants health..Dont know if it's true but it's just what I read.
orangeman Reviewed by orangeman on . RUNNING LIGHTS TOO LONG? Greetings, i was just wondering out of curiosity if it would be detrimental to a plant if it were exposed to more than 18 hours, upto 24 hours per day. Either state? Thank you. Rating: 5