hi there mrberrys, i think fans on them when they are so small is ok as long as the temps arnt to low, it may slow them down a bit but i guess its good groundwork for the future, build them nice and strong.

sounds like your having simmilar problems to me with the heat.
i cant use natural light for the first stages because to get light they will get to cold, so its hps with lots of artificial cooling or nothing, really.

you have a smaller hps tho, i would be tempted to run that and see what the temp difference is.