This is a specific conversation about Reptile heating and lighting — the critical factors — ask about yours and get one honest answer for your exact situation.
inparticular.ai
Getting heating and UV lighting right is genuinely the single most important factor in reptile health — metabolic bone disease, respiratory infections, and most common illnesses trace back to incorrect temperature or lighting. At twelve years old, your leopard gecko is doing exceptionally well, and you're right to be thinking carefully about heat management at this stage. To give you the best advice, can you tell me what enclosure size you're using, and what heating setup you currently have in place?
She's in a 3ft wooden vivarium with a heat mat under one end, no thermostat on it at the moment. She's been on the same setup for years but lately she seems to avoid the warm end more than she used to.
inparticular.ai
That's a really telling sign. Older leopard geckos often become more sensitive to heat — their metabolism slows and they can't thermoregulate as efficiently, so a mat running at full power can feel genuinely too hot for her now even if it never bothered her before. Running a heat mat without a thermostat is the first thing I'd fix. What temperature is the warm end reaching currently, do you know?
I don't actually know — I've never measured it. Is that bad?
inparticular.ai
It's very common, but yes, it matters a lot — especially now she's older. An uncontrolled mat can push the surface to 40°C or above, which is too high for a leopard gecko at any age, let alone twelve. The fix is straightforward: add a thermostat. For a senior gecko like yours, I'd specifically recommend the Habistat Mat Stat Thermostat. It's a simple mat-only thermostat that lets you dial the surface temperature precisely — I'd suggest setting it to keep the warm end surface around 28–30°C, which is warm enough for digestion but gentle enough that she won't need to avoid it. It plugs directly between the mat and the socket and costs around £20. That single change will almost certainly bring her back to using the warm end comfortably.
That sounds really straightforward. Should I also be thinking about UV lighting at her age — does she still need it?
inparticular.ai
Leopard geckos are crepuscular and have historically been kept without UV, but current evidence strongly suggests low-level UV genuinely benefits them — and for a senior gecko, supporting calcium metabolism matters even more as their bodies become less efficient. A low-output UV tube like the Arcadia ShadeDweller 7% at 6–8 hours a day would be ideal. It's not bright or intense, just a gentle natural light cycle. But honestly, the thermostat on the heat mat is the urgent change — do that first, then look at UV as the next step.
Perfect, that's really clear. I'll order the Habistat Mat Stat today.
inparticular.ai
Great decision. Once it arrives, set the dial to bring the warm-end surface to around 28–30°C and check it with an infrared temperature gun if you have one — they're cheap and genuinely useful for reptile keeping. I'd expect to see her using the warm end again within a few days once it's dialled in. Twelve years is a remarkable age for a leopard gecko — she's clearly had good care, and this adjustment should make her remaining years much more comfortable.
