I just ordered the last one off Amazon Australia. I'm hoping that it'll put off a lot less heat in summer as compared to my 1000 hps. I can't ever get a good grow during summer here. Not when we get temps of 40+ in the shade. Everything stretches and won't fill out. I've tried everything from SOG to 4-6 hrs of light over the years. Nothing works. I'm hoping that using PAR rather than hps spectrum will give a better result. Can you tell me what sort of heat the LEDs raise the ambient temperature. It's winter here and usually I get my best results in the fall (autumn) early and then on the early spring. Everything grows as the breeders advertise. If the xs4000 doesn't raise the temperature enough during the nights when it sometimes gets down to 3 or 4 degrees C. I may need to run a 250, 400 or 600hps just to warm the tent a little. Any hints would be greatly appreciated. Thanks man