Hashyanswered grow question 4 years ago Do you have a extractor fan. 50c is very hot, to hot. You might be better using the hps in winter when you may need the extra heat. I grow in a tent in my loft. Loft temps at the moment are 30c without anything running. I use a marshydro ts1000, it produces a bit of heat but no way near as much as a hps. To combat the heat or help manage it I vent my hot air out the tent to the outside and I draw air in from the outside. I draw air in from the coolest side of the house. You really need to get on top of that heat. Environment is so crucial. Hope you get on top of it.