I take exception to that statement! Hate the game but don't hate the player, I just retired from the military.

What ever heat that may be seen from a 150 watt grow is nothing compared to the heat that can be picked up from an over set to broil or someone barbecuing on the back deck. The amount of heat is null for what they are looking for.

I would not worry about it unless your doing it in an attic of a poorly insulated home.