There is an FAQ on that topic.

Harvesting with the lights on is easer, you can see better that way.

Keep the lights on as long as you need them to see what you are doing.
(hey that's what you asked)
Zandor Reviewed by Zandor on . harvesting just need a bit of help what is the best time to harvest lights on or off if lights on how long should thay be on thnk the ratman peace....pot....patience :confused: Rating: 5