Can you tell me if this quad has reflector panels that drop down in between the bulbs? If it does not you will find very reduced output with the UVB bulb. A 5.0 will not work you would need to use a 10.0 UVB bulb. However typically using a quad with one panel means having to have the distance to the branch much closer. It will depend on the fixture itself of course so you will need to take a reading with the solarmeter. When I had a 1 panel quad I had to have the fixture 6 inches above the branch just to get the cham in a 2-3 UVI zone where it stood off the branch. This means lighting even closer to the cham and quads can put out some major heat. If this is the case you might consider getting a regular T5 fixture for the UVB bulb and having that one at the 8-9 inches from the branch then put another 6500k daylight bulb in the quad to replace it. Then you can adjust distance for UVB independently from the quad.
Also I can not tell but if the fixture has the plastic/glass barrier below the bulbs this will filter out all the UVB.
I agree with
@Jpeff on your 12k bulbs being too strong for a chameleon.