I'm only seeing the one screenshot of the 18" Zilla light. Can you try again to share the pics of your cham?
Regarding UVB length, the bulbs don't put out as much UVB on the ends, so that's why we like to get bulbs that run the entire length of the cage. But if this is the best you can find for now, then it's better than what you have and you can place it in a spot where your cham likes to hang so he definitely gets those UVB rays. Go with T5 as they last longer and the UVB goes deeper in the cage, which you want with a tall 4' cage like you have.
Regarding basking - do you have a regular basking lamp, or am I understanding correctly that you had the blue light and two coil UVB lights? The way my lighting is set up is I have the one linear UVB and then a separate bulb for heat. If you don't have a regular bulb for heat then you can swap that blue bulb out. Here's the kind I use, but any incandescent light will do:
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