2.0s are for understory and mostly-aquatic amphibs, they're not going to do enough for your lizard. Your plants are going to love them, they're fantastic grow lights.
Get 5.0s, and never ever assume that "full spectrum" means it includes UV of any kind. You need a certain phosphor mix and a specific type of glass(low to no iron) to produce meaningful amounts of UV light from any lightbulb(part of why UV bulbs are so much pricier in comparison to regular fluorescents, zero-iron glass costs a bit more to make), so unless it specifically states on the package that the bulb will produce UVA and UVB you can safely assume that none will be produced.
Full-spectrum basically means "full human vision spectrum", not "every wavelength higher than infrared and lower than x-ray."
Also if you have a 75-watt basking bulb, it most certainly is not a UVB bulb unless you bought a Sunglo or similar. It pays to be as specific as possible when you're describing your equipment setup, as if you had a 75-watt Sunglo/similar bulb you would in fact be getting both heat and UVB off of it, but if it's a regular 75-watt basking bulb it's just heat, visible light, and a small bit of UVA on the low end of that spectrum.
If you somehow had a 75-watt bulb that produced nothing but UVB, your cham and anybody who spent more than a half-hour in the room would likely be sunburned to hell.
