The natural sunlight helps your dragon make vitamin D. If your dragons are not regularly in the direct sunlight, then give calcium with d3 and no phosphate.
I don't leave my dragons in their cages all day. They need two hours after a meal, of basking at at least 100 degrees F to digest their meal. They also need UVB exposure, either regular outdoors sun or a
UVB bulb. They don't have to have 12 hours under your UVB every single day, so if it is hot, and you want them out, take them out. Just make sure they spend some time with exposure to UVB and are warm enough to digest their food.
My dragon Ash spends at least 3 hours a day in a dog x pen with a heat lamp, because he hates his cage. We also sun outside. :mrgreen: