I using a 5.0 + 2.0 exoterra uvb ligths! he didnt get any sun ligth but now i will try too put him like 2 o 3 hours per day in a 3 o 4 day of the weeks! i using to feed for now roach and something superworms! and i feed them with doog food and some Fruits/vegetables! i try to feed him like 5 o 6 per weeks! one day of Fasting! thansk for u answer btw!
If you get that much sunlight and with your UVb you wont need the extra D3 supplement.
You should stop using the dog food in your gut load. Chameleons do not process animal protein well and can end up with gout from too much animal protein. Be sure to use fruits and veggies that are of good nutritional value. The following links may be helpful.
I use this list often in general for all my reptiles.
you might want to look up sandrachameleon and her blogs on nutrition as well.