Bearded dragon belly burns — fixing bad heating

Under-tank heaters on bearded dragons are a serious problem — they can't feel substrate heat the way mammals do, so they just sit there absorbing it until the damage is done. Belly burns are unfortunately common with this setup, and I'm sorry your dragon went through that. Bad lighting is the other half of the picture: incorrect UVB and basking temperatures are the most common husbandry mistakes with bearded dragons, and they cause metabolic bone disease and chronic illness that builds quietly before most owners notice. To point you toward the right setup, I need a few details — what size is the enclosure, what bulbs are you currently running (brand and wattage if you know them), and how is your dragon doing now post-burn?

Your instinct about the coil UVB is correct — compact coil UVB bulbs are widely considered inadequate for bearded dragons. They produce UVB in a very narrow cone, the output degrades fast, and there's documented evidence they can cause photo-kerato-conjunctivitis (eye damage) in reptiles kept too close to them. For a 2-year-old adult dragon in a 4x2x2, she needs strong, even UVB across the length of the basking zone. Can you tell me where the basking spot sits inside the enclosure — roughly how far from the top of the tank does she bask, and does the vivarium open from the front or the top?

That's a very typical front-opening wooden viv setup, and 25–30cm from the lamp is a workable distance. Here's what I'd recommend: the Arcadia Dragon T5 UVB Kit — specifically the 54W 12% T5 HO version sized for a 4-foot enclosure. Arcadia is the gold standard for reptile UVB in the UK, and the 12% output is designed specifically for desert species like bearded dragons. The T5 HO tube gives you broad, even UVB along the full length of the basking area rather than a narrow hotspot, and at 25–30cm distance you'll be delivering a UV Index of around 4–6, which is right in the target Ferguson Zone 3 for bearded dragons. Mount it inside the viv at the front of the roof so the basking surface is directly underneath. Replace the tube every 12 months even if it's still emitting visible light — output drops well before the light goes out. For basking heat, run a separate halogen flood bulb (a standard 50–75W halogen works well) on a dimmer thermostat to hit 40–42°C on the basking surface. That separation of heat and UVB sources is exactly what she needs.

Yes, the Arcadia Dragon T5 UVB Kit is available on Amazon UK — search for 'Arcadia Dragon T5 12% 4ft' and it'll come up. It typically runs £55–75 depending on whether you buy the controller and tube together or separately. On the belly burns: yes, please see a reptile-specialist vet if you haven't already. Superficial burns can look healed on the surface while infection or deeper tissue damage is still present, and a 2-year-old dragon with compromised skin is vulnerable. A vet can also check for early signs of metabolic bone disease given the UVB situation has likely been suboptimal for a while. It doesn't need to be an emergency visit, but don't skip it — a specialist will give her a proper once-over and you'll have a solid baseline going forward.

Great question, and important to get right. UVB does not penetrate glass — the front sliding doors will block it entirely, so that's not a concern as long as she's not expected to absorb UVB through them. What matters is that the T5 tube is mounted inside the enclosure, which is exactly what the Arcadia kit is designed for. The tube goes inside on the ceiling, usually behind a mesh or acrylic diffuser that comes with the unit — check whether yours is mesh (fine) or solid acrylic (replace it with mesh or remove it, as acrylic also filters UVB significantly). As long as the tube is internal and unobstructed, she'll get full benefit every time she basks directly under it. You're on the right track — sort the vet visit, get the Arcadia kit mounted internally, add the halogen on a thermostat, and she'll have a genuinely correct setup for the first time.