I've decided that i'm never growing indoors in summer again, unless I restructure my grow room to allow for an actual cooling system
Just re-structure your light times lol
I veg on a 12on 5.5off 1on 5.5off (also known as the gaslight method) The idea after veg is to then switch to flower for 10 hours for a few weeks then 9 hours for a few weeks then 8 hours for the last few weeks... Also because the 12 hours light builds up flowering hormones (some of which are destroyed when the 1 hour on kicks in, just enough to keep it in veg) they flower a fair bit quicker, you can shave a good week + off the final time.
I haven't tried the flower version of it yet but in the 12/5.5/1/5.5 schedule for veg, you get really healthy fast growth with no stretching, only downside is the growth seems to be focused on the main stem, you don't get as much internodal growth. But hey once you top your sorted
And don't argue with me about it not being a veg cycle, it'll cause herms etc.... IT DOESN'T for the simple reason that the plants don't quite get kicked into flower... Oh and I tried it for a good 3 months...
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Anyway, sorry that side tracked me a bit. Run your 12/12 schedule say from 7pm-7am as the night time temps are always going to be cooler than day temps (even helps in the winter as night temps are colder and need the heat from the lights). And run your veg cycle overnight as well you can drop the time the lights are on to a minimum of 13-14 hours (unless doing the technique I just described).