thos are basking bulbs and i believe that is says that on the box.
if you use a regular house bulb i think you will be ok if you just put it on top.
i would watch it for a while just to be sure.
if you basking temp gets to hot then you can raise it up a little bit,
or if your stuff melts then you can also raise it up.
That's correct, those are basking bulb distances, regular house bulbs will have to be placed much closer of course. I have a 60 watt that sits on my felxarium all day long with no melting or fire. not to say that it's 100% safe though, I keep it raised a couple inches off the material just to be sure. 100 watt right on top of the cage will cook ur Cham if he's right under it.