what's the prime temp for growing?

I've never got a perfect answer to this it always varied from 70-75 but my buddy said keep it 68 for the best, and my rooms were always 95 with 24/7 cooling, now I got my shit together and got a bigger a/c unit, so what do you keep your temps at, and is a colder or hotter temp better while the lights are on or off or would it not matter? Thanks

78 degrees fahrenheit.

78 is perfect anywer beetween 75 and 85 is ok tho

75 degrees is optimal temperature
But there is an acceptable range. Try not to have temperatures exceed 90 too long because it may cause growth stunt.

My girls thrive 78 to 82 during the day. 72 to 75 at night. I add co2 once a week

Mid seventies is ideal, I've heard tell that mid eighties, while it wont hurt them, can actually begin to slow down growth some.

They were in 95 degrees with 24/7 ac cooling just couldn't handle it, I finally upgraded, I read as long it doesn't go below 59 you won't hurt the thc, I'll keep it 68-70 as my plants have suprassed my one's that have been flowering for 60 days and these ones are 3 weeks and are much bigger and better, and I learned how to top, I got a elephant in a 18 gallon bucket it's got to be at least 4x4 and only at 3 weeks of flowering, before I also only had 1 1000 watt now I got 3200 watts and adding a few thousand more this month and no bugs anymore and light leaks, timer blows, etc I yielded half off each plant so far, but my new plants look like a good 3-4 or more oz's Easy per plant