How to switch light times

Currently running my lights from 8am till 8pm and I wanna switch so lights are on at night instead of daytime. Will it screw up my flowing cycle??

Probably not if you do it gently ( back wards would probably be better since they’ll just lose 1 hour of rest a day) starting 7 to 7 then 6 to 6 etc

I just do it. Leave them in a really long dark period, until the correct light cycle is on, they’ll adjust.


what covert says, its the dark cycle you want, just make sure they get the 12 or more hours of darkness