i run my lights from 6 in the morning to 1 oclock am because the cabinet isnt completely light proof so if i had my dark period in the day there would be light leak onto the plants.

And yeah when it comes down to it i think 2 400w hps lghts are my next expenditure. have a friend working a demolition job and came up on a bunch of high bay hps lights so i think ill be getting in touch with getting one of those and trying to figure out how to make that work. especially during flowering.

But as of right now the heater is running 30 min avery hour and 30 min and it keeping the room nice and the plants are reacting extremely well to it by standing much higher and proud. have it on a timer so it saves at least some energy and cost.