Your beardie is so tiny & cute. :love5: Unfortunately, the ESU light is not a good one. It emits virtually no usable
UVB light at all. You can use it as a regular flourescent to brighten up the tank with though, but you do need to get the Reptisun 10 flourescent tube bulb so he can get some good UVB exposure. If you have your receipt you should be able to take it back or use it for now and order this one which is so much better:
http://www.petmountain.com/product/bulbs/504983/zoo-med-reptisun-10.0-high-output-uvb-bulb.html In the meantime, the UVB should be placed on the screen behind the basking bulb so that he can get UVB and heat at the same time while in his basking area because where he is sitting now, he's not getting any benefit from it at all. The UVB should be within 6 inches from him when he is basking, so according to the picture, it looks like you will need to put something like bricks under his basking area to raise it higher.
What are the basking & cool side temps? Were you able either a temperature gun or a digital thermometer with long wire & probe end? Those are the only 2 ways to get an accurate reading and any type of stick-on thermometer can be as much as 20 degrees off. You need a basking area for a baby about 105 to 110 (but no higher) and a cool side of about 80 degrees so he can thermoregulate properly. The cool side of the tank looks a little dark, so depending on the temp there, you could use a 25 watt household lightbulb on that side or a coil (non-UVB) standard household bulb if the temp is within range there already and that will help brighten up that side.
Are you using calcium and vitamin supplements, if so, how often?