Do you know what wattage I should use?I would start with one and a digital probe, take measurements and adjust based on the probes reading.
I haven't connected the tank to power yet but currently I have two 75 watt bulbs but they are infared so I'm getting new ones and I'm looking at the Arcadia Halogens.I would start with the 75 and see what the basking temp is. If it's warm enough check the cool end to see what ambient is. If you need more try a 100 watt, and recheck both basking and cool end. If it's still cool then try the 2 75's. It's really just trail and error.
Yeah I have a probe thermometer and a thermostat. My room cools down to about 15 on winter nights and its now spring so they are warming up ever slowly. I'll look at getting the light soon. Also a question about UVB lights can anyone send links for the 22" Arcadia UVB 12%?xp29's right, it really is trial and error with heating. i have a very thick 4'x2'x2' melamine enclosure with a solid top, so i only have to use a 50 watt to get the proper temperatures. when i had a 20 gallon glass enclosure i had to use a 100 watt. the temperature of the room will be a factor too. start with 1 of the 75 watt halogens and go from there. this is the light i use just for reference. https://smile.amazon.com/gp/product/B07SM1WSN2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
this is also why the probe thermometers are important because they are the most accurate as far as readings go. they will read the surface temp on any material where the IR guns can be off depending on the material your basking spot is made of. stick on dial thermometers are the least reliable and will only give you the ambient temperature.
We have petbarn and best friends lol which are built using exo-terra products!That is on amazon, its cheaper at petsmart but i dunno if you have them in Australia