from what ive learned, read, heard, and experienced (had a blackout during veg, along with a few other issues) the dedication to light cycle is critical during Flowering.
I was veggin 24-7, then switched to 18-6, then had the blackout during a storm for about 2-3 hrs. I re-set the timers to correct time and resumed the preset light cycle.

altho i had a variety of issues thru the grow, i cannot directly attribute any particular issue to that blackout, it was during veg, if i didnt say that before.

altho one oddball wildcard sativa did try to herm:wtf: (i gave a quick vasectomy and isolation, and he/she recovered, no more nanners), i believe that was due to heat or crowding. she's been kinda finicky froom the start anyways.
my Thai girl is doing very well, (seeds from the archives, long story) prolly another 3-4 wks and she'll be done, and prolly real stick too.:jointsmile:

and as to your timer(s), with 3, 1kwatters, you can prolly afford the right equip.
i would buck up and get the badassed single timer to handle the load,,,if i had that situation and the doh.

Rock on man.
Jah Love:rastasmoke:
Love Jah:rastasmoke:

Rock.