My hood is a Magnum XXXL hood, I have a fan running through it, just a nomal fan though and ducting at the other end. When I put my hand under the light where my girls are, it does not feel hot, I have a big tower fan running over them, and that kick ass, it keeps them cool. Thats why I think its too much light, the SLH are slightly pale, although the amnesia seems strong and happy.
Peace.