On my screen cage il just let the water from the dripper collect on the cage and it will start dripping from there eventually. Dont damage the enclosure for it yet since odds are the cham doesnt use the dripper.
In the Netherlands the latest 'hype' is to not use D3 suplements at all ever.
According to some researchers it would probably do more harm than good since it could cause an overdose while proper UV lighting should provide sufficient D3 ...
Dust calcium daily and replace it for vitamins once a week.
Personally I like to gutload the food aswell if possible and also add in a day where I don't dust the food at all.
I like to think the cham apreciates the food without the powders more... Dno if it's true, but what's the harm, right?
I think it's not that strict, atleast not so much once the cham is fullgrown... Just do it regulary and feed a broad variety of insects and you should be fine.
I'm not an expert in chams but I'm keeping reptiles for about 15 years now and never really had health issues with them and their growth. (Luck too I guess)
I wonder about the LED UV lights... Here we don't have em alot and mostly use tube lights, spiral lights or Vapor/HQI flood/spot lights (HID) ... I use a 26W spiral light myself for my Jacksonii.
LED light ofc should last long as a lamp but the UV does decrease over time I guess...?
For tube and spiral lights they should be swapped every 6 months to a year, for vapor and hqi this should be done every year to 1.5 year... How is this with LED UV lights?