@masterpieceᕙ(◕ᴥ◕)ᕗ That bulb does not penetrate very far down into the cage from the bulb, maybe 14" when brand new and gets weaker over time. Plus the screen on top blocks a lot of light.
Masterpiece, can you put his and her cages safely outside where they won't cook in the sun but they can get morning sunlight? Cages, even screen cages, can build up a lot of heat as the black frame absorbs heat from the sun. It happens quickly. Just make sure they have access to shade. Put the cages away from surfaces that build up and radiate heat. Under trees is good as trees keep the air cool. Natural sun is much better than any UVB light you can buy.
You do have them in separtate cages so they can't ever see each other? Chameleons get very stressed when they see each other and it can also trigger the female to produce eggs, which you do not want. As I mentioned earlier, stress suppresses the immune system. Moving homes is stressful. Being handled is stressful. Being in pain is stressful (unless his MBD is completely healed--and I doubt it--he is in tremendous pain from broken/bent bones).
Don't force feed him by making him angry and gaping. He doesn't need that stress.
Your original post was about him being too skinny. Veiled males have a knack for looking pretty skinny--they are almost shape shifters they way they will flatten out. Reptiles do not build up fat under their skin all over their bodies the way mammals do. They don't have a need for an insulation layer to conserve body heat the way a warm blooded animal does. They have fat bodies where they store fat, the main (only???) fat body is in their belly. Dehydration often looks like an animal is too thin. When an animal is dehydrated, the skin loses its elasticity and "plumpness." Learning what a dehydrated chameleon looks like is a learned skill. Urate color (white being good and yellow/orange showing dehydration) is only one part of it. I tend to look and at the skin over the spine/pelvis and see if they look skinny--if you can see the definition of the spine, muscles, bones. Your male is a bit of a mess, so he has a lot of different issues going on. Mist him like crazy. They don't drink from a bowl. I never see my chameleons drinking unless they've just laid eggs, so don't rely on your not seeing him drink to him being hydrated.
They don't need night lights. They have a third eye so have some vision even when their eyes are closed. Constant light is stressful. They also need a drop in temperatures at night. A night light is just a heat bulb of some kind. Veileds come from the escarpments along the western edge of the Arabian Peninsula, primarily Yemen. It goes down to freezing in some places where they are native. I wouldn't recommend temps into the 40s for a veiled at night, but they should do just fine with those kinds of temps at night as long as they can warm up in the day.
You might not have created this mess, but you are now stuck with cleaning it up. Your male is likely critically ill, which is why I originally responded so bluntly. I understand you don't yet see this.
Throw away the night bulb
