I am measuring temps using a probe digital thermometer. Thank you for the extra clarification.@Gloriawood awesome job!
@noahrg4 make sure your calcium without D3 is also phosphorus free! That’s very important as feeders are high in phosphorus, so we use calcium to help balance that ratio. A couple more things are the two trusted uvb brands are Arcadia and Zoo Med. If possible, get the Arcadia ProT5 uvb kit with a 6% Arcadia T5 uvb bulb (you’ll replace the bulb yearly like @Gloriawood said). Make sure it is at least the length of what his biggest enclosure will be, or longer if you’ll be placing the fixture diagonally across the top of the cage. If you can’t get Arcadia, use a Zoo Med ReptiSun 5.0 T5 uvb bulb (replace every 6 months). The distance from the uvb bulb to the basking branch will be 8-9” away. How are you measuring your temperatures? For basking temps, you want a probed digital thermometer, with the probe placed where the top of your cham’s back is when he’s on his basking branch (make sure his heat bulb is at least 9” away or more from the basking branch)