Please do yourself and all of us a favour and remove the heat lamp, if your going to have something that creates so much heat, then why not match it with lumens, go for a 400watt High Pressure Sodium with stainless steel reflector, this will help redirect any lost light.
I use a 400watt for vegitation (18/6) and flowering (12/12) but only fluorescent light for clones..........
you will find that with a 400w, you'll get beautiful leaf coverage, and nice early branching, for ultimate growth always keep at a regulated distance of about 12-14" from the top of the plants to the light bulb/globe.
But if you don't have the spare cash laying around i agree with Zandor!
you should listen to him, he is wise!
Peace Bliss! :thumbsup: