Howdy smoorman, The green spectrum will not adversely affect the photo period of the plants. I have been using the active eye green lantern head lamp that is worn on Your head, freeing up Your hands. I uxe mine to check the temperaatures in the reservoirs and to change out the ice bottles during the 'lights off' period and it has worked well, worth the cost (I think that I paid around $10 for it).