Hey thanks so much for the input, everybody!
I'm gonna go with straight to 12/12. The gas lantern thing scares me a bit; I've been attempting to fool these gullible girls into thinking this is legitimate outdoors wilderness they live in, the gas lantern seems to deviate too much from nature (well the sudden drop from 18 hours of light to 12 might also be something of a dead giveaway, but I've had success with that in the past).
Well, I've already set the timer! It's gonna get real dark real early for the first time today! How exciting!
My main worry is the girl that's been vegging for two months, but I think we'll manage. Worst case scenario, push comes to shove, God forbid, she's only schwag bagseed.
PICS:
This is a pretty tight, strictly personal operation, 2'*2'*4', 250 watt HPS cool-tubed, filled to maximum capacity with 4 1'*1' pots. I got multiple fans running from above the light, keeping the leaves dancing. As I said, one of the girls had like a whole month head start, and she's actually twice as tall as the three other ones, but I got everybody's tops to be roughly the same height using the finest literature available. The other ones (Reserva Privada Tangie [holy crow those leaves smell distinctly of orange peelings, what the heck? Is this possibly a cannabis-orange hybrid?], Female Seeds Sexbud and Female Seeds C99 [I don't know which is which, haha!]) have had 27 days of vegging.
I'll keep y'all posted on my Stretch Situation! Exciting times!