Stink bugs. They are beardy and cham approved staples.
Not sure where you are from, but up north, these little guys invade your house, live rent free till spring, then move on. They dont eat anything, just kinda hibernate near the ceiling where they can keep an eye on you.
Happens all the time. You get stuck shed. Then you get another, and the one closest to the skin never dries out and just becomes a biodome for things that can live off of skin. Once the skin is removed its pretty easy to clear up with little effort.
Alot of people who want large chams, just double up the 2x2x4, or have a "free range" that is used daily, but the cham sleeps in the locked up cage. As for cool large species, Oustalet's are huge and harty, and come in some color variants.
Im concerned about the multiple layers of shed on the same spot. That is normally a fungus or bacteria issue. Once you get to layer two, layer one become a bacteria bed.
I did the math years ago (have fun finding my posts 10 years ago), but Beman is right. Without individual reflectors, output is horrible beyond a 2 bulb fixture. Like a 4 bulb was only putting out 133% (and inners 33% of rated) of a 2 bulb which was only putting out 166% of a 1 bulb, bad...
And it causes the mesh to rust.
Its not all bad, if you do it high enough from top, you end up with a rain dome instead of a ultra fine mist, this does have some benefits for chams that hate the fine mist.
You have i assume a coconut fiber mulch floor. This can be fine, as long as two crickets dont fall in love etc. Its generally not recommended for beginners. If you throw in some cleaner crew, the poop will be self cleaning however.
Basking spot, surprised a 100 watt only gets to 34c, but...
Gotta remember its a "supplement". Its just a little insurance incase your gut load is not on point. There is no "dosage" only frequency a wee bit is all that is required. There is a huge surface area difference between 6grams of dubias vs 6 grams of crickets, it well over 10x the square...
LoD is still pretty high. Its fine for growing chams, but not adults, still too much D3 for daily use as it were.
D3 levels of popular powders:
RepCal D3+ 400,000 IU/kg
Flukers Reptacalcium 100,000 IU/lb
Exoterra 14,740 IU/lb
ZooMed ReptiCalcium 22,907 IU/kg
Mineral -indoor 2000ui per kg...