I woukd assume it puts out equivalent to the 10.0 as far as uvb. Which is a little to much. Though u could move it back.. its more or less for desert dwellers that need tons of uvb and 105+ basking temps. A little too intense for a cham I'd think. But like i said move it a foot and a half away and u may have something. itll dull the uvb output and lower the basking temp.. i would never tell someone to get one for a cham. But if u wanna make it work u could try
Edit: u could put it in one of the all wire domes so some of the heat and uvb can disapate out the top bringing down the intensity
I wouldn't use it, when your chameleon moves away because outs to hot it won't be taking in any UVB so use a normal house hold bulb for basking bulb and a UVB bulb that's gives of no heat