if you want to squash the heat signature heres the reflector to do it. it will be on the market in wide spread production in less than 30 days.
Liquid Lumens
We have imaged the bulb with IR @ 1000watts it looks as a normal lamp.
the tops can be 3-5 inches from this tube making you less lan 6 inches from the bulb.
your set up cost will be high, but your off the radar from there.
Being invisible ... priceless