Yeah don't even trip slightlyVaped, just keep the lights back to it's regular schedule and no harm done. Once i didn't know the timer had broken (years ago and a cheap walmart $5 time) so when it "clicked" off it didn't actually cut the electricity (24 hour light). I never visited the grow unless the lights were on, so a few weeks went by and oh fuck no further flowering, like they were stunted, then these strange little mutated leafy stems started shooting out of the buds and i was screwed, 20 plants under 2200w, fucked over from that! So yeah, a day of screwy lights, no worries
And about the flushing, in pure organics, flushing shouldn't even be a part of the vocabulary. By design you are feeding less or not at all in the last two weeks of flower anyways since the plant has pretty much done it's thing, so it's a type of flush without really actively flushing, ya know? I finish in 5 or 7 or sometimes 10 gallon buckets, no drainage, an inch or two of perlite on the bottom to buffer any overwaterings, when it's cut the perlite is just teaming solid with roots and oddly enough i notice having to water more often then when i use bags or pots with drainage.