Hey sunbiz1,

No problem just reducing it in one shot. But why do you want to give your plants less light?
Most of the plant growth and flower developement is based on photosynthesis, shoter photoperiod less developement.

But hey, it's your plants.
OM
oldmac Reviewed by oldmac on . Quick Lighting Question during Flowering Does an abrupt reduction in the amount of light have negative effects 3 weeks into flower stage?. I was considering reducing it by 1 hour and was wondering if doing so all at once will cause problems, and if so how much should I cut out daily to reduce total from 12 to 10 hours TY in advance for any input, Biz Rating: 5