i try my hardest to maintain a min of 20 and max of 30 but as ive grown in different places it hasnt always been possible, right now for instance ive just built a new grow room but i'm havin temp issues, i think i can sort them but.....we'll see. but no i dont get too anal about temps, as long as the plants aren't dieing i dont really give a toss. one of my last grows was in a room that had a fuckin hot water tank in it, it was terrible to control, i didnt live in the house myself so i couldnt open and close windows to suite, nite temps were plunging to 14 or 15 centigrade. but...wot can you do??? its just ah case of trying to sort shit out as it happens.