Am having major heat problems myself. Only on my second grow and have just set myself up another tent for starting my seedlings and veg. I have a 1.2 x 1.2 x 2m tent laying down on its side with 4 x 200w CFL's in one shade. Couldnt believe how hot these lamps were getting but am mainly putting it down to them being self ballasting. Anyway only planted the seeds 2 days ago. When i checked the thermometer the temp had reached a maximum of 40c/104f. Hooked some decent extraction up straight away and now have it down to 33c/91f. Am growing in soil on 18/4 light and dont have any sprouters yet. Are these high temps gunna stop my seedlings from sprouting?