I have a 400W and a 1000W (and yet the police still have not come over...)
I use the 400W in my crawlspace for the highlanders and cool growing plants. It is on a track and mounted 45cm above things like Drosera and 75cm above the Neps. Works great that way.
I use the 1000W in the sunroom for whatever I have in there which is currently the tuberous Drosera and a few other odds and ends. It is 1.5m above the plants.
The 400W does not produce much heat, the 1000W is basically a miniature oven, even at 1.5m I can feel the heat from it.
For a bulb I am using the AgriSun Gold which is a combo Na/MH so provides both ends of the spectrum.