None at all, had my timer go mental and turning on and off whenevr he wanted, so i had my autos with basically something like 3h on 30min off 1h on 30 min off 4h on 30min off 1h on 6h off and they still all did well. It was during my growbarato diary, now i dont use timers at all.
Whenever i find a reliable one i might go back to timers, in relation to the plant, she won't care.
Photoperiods- (timer goes rogue) WHAT THE FUCK?! IMMA DIE ,IMMA REVEG, IMMA DO SEEDS!!!
Autoflowers- (timer goes rogue) Did something happen? I could had grown an extra 0,001cm during the time it was off, oh well back to normal now.