i agree hps give off plenty of heat, my grow door is open now we are in summer, its getting hot in the grow room, got fans on high doing their job,
cfls are great for starting plants, i will always use cfl for the first week or 2, then they all go under dual spectrum hps for veg then flower,
@AleX, is that a staff in your avatar, i got a staff, my last one looked exactly the same as the one in your pic, in fact id have to say it is my dog, lol, my last staff used to love the snow, he find a snow ball and carry it in his mouth for miles, he would wait outside the shop and put snow ball on the floor, then walk home with it in his mouth, then he would eat it and puke everywhere.
my new staff is huge, like a staff on steroids, problem is he thinks he is a cat, i got him when he was 8months old, his last owner got him as puppy but she had a cat and this cat obvisously bought this staff up, now my dog thinks he is a cat, when he sees other dogs he gets down low to the ground and crawls like a cat stalking its prey,
best dogs by far, its the only breed i will have now, loves kids, problem is little dogs keep attacking him, not sure why but they do, he just lies down and lets them bite him, it dont bother him so clearly not hurting him, he just sits their taking it, he wont take it from a bigger dog though, they only got to look at him wrong and he will go for them,
but if they dont bark and show signs of aggresion then he just sits down and lets them come over and play with him, loves swimming in the river, their easy dogs to train as well,