If you do have a long UV tube fixture I didn’t spot then ignore this, but if not: It looks like you’ve got a coil
UVB bulb, and if that’s the case you’ll want to ditch it immediately and get a Reptisun 10.0 tube or Arcadia tube. You’ll want it mounted inside the tank as well, as placing any UV light over a screen top means up to 40% of the UV will be filtered out. And since coil UVB bulbs have a much weaker UV strength to start with, he’s not getting adequate UV with that setup. Order a 10.0 Reptisun (or Arcadia) tube and fixture ASAP. In addition to not providing adequate UV light crucial to a beardie’s growth and wellbeing, coil UV bulbs have caused documented vision damage in beardies. Other than that your setup (no loose substrate, hides, etc.) looks good. Because I noticed the stick on thermometer, I just want to mention that his basking and cool side temperatures need to be taken with a digital thermometer (if you don’t have one), as stick on thermometers can be off by 20 degrees. Getting the correct UV bulb should be priority number one, and once you’ve taken care of that Spike can grow into a big healthy beardie.