Hermann tortoise vivarium heating setup

Moving an adult Hermann tortoise from an open table to a enclosed vivarium is a significant change — and getting heating and UV right in that new setup is genuinely the most important thing you can do for their long-term health. Incorrect UV or temperatures are behind most tortoise problems including metabolic bone disease, poor appetite, and respiratory infections. Before I point you in the right direction: what size vivarium are you moving them into, and what do you currently have in terms of any lighting or heat source on the table setup?

Good — 120cm is a workable size for an adult Hermann. The compact UVB bulb does need to go, I'm afraid. Compact bulbs produce very weak UVB output and it degrades fast, so there's a good chance she's been getting far less UV than she needs. In a vivarium that size, you want a T5 UVB tube running most of the length of the enclosure. For a Hermann tortoise, you need a 10% or 12% UVB tube — the Arcadia 12% T5 is the one I'd point you to. It's well-documented, widely trusted, and designed exactly for high-UV-requirement species like Hermann's. Now, on the ceramic emitter — are you planning to use it as your main heat source, or just for overnight top-up?

That setup will work well. A 100W ceramic heat emitter on a pulse proportional thermostat is the right combination — it gives you precise temperature control without the on/off cycling that a simple on/off stat causes. For the ceramic bulb itself, the Arcadia Ceramic Heat Emitter 100W is reliable, long-lasting, and fits a standard ES (E27) lamp holder. Pair it with a Habistat Pulse Proportional Thermostat and you'll have rock-solid temperature control. Aim for a basking spot of around 30–32°C directly under the emitter, dropping to 20–22°C at the cool end. Because ceramics produce no light, your UVB tube becomes the only light source — so make sure you're running it on a 10–12 hour cycle timed with a basic plug timer.

You need the Arcadia ProT5 Kit — that's the reflector hood and controller unit made specifically for their T5 tubes. It's not just any fluorescent fitting. The reflector is critical: it doubles the UV output that actually reaches your tortoise compared to a bare tube. For a 120cm vivarium, get the 54W 1150mm kit with the 12% tube included. Mount it so the tube is no more than 30–35cm from the tortoise's shell when she's basking — Hermann's need strong UVB and distance kills the output fast. This combination of the Arcadia ProT5 12% and the ceramic emitter on a pulse stat is genuinely the gold standard setup for indoor adult Hermann tortoises.

For a Hermann tortoise you don't want a heat mat — they're ground-dwelling baskers and heat mats can cause issues with digestion and shell development if they warm from below rather than above. If your room drops below about 15°C overnight, the ceramic emitter on a thermostat set to a night-time drop of around 18°C is all you need. The only other thing worth adding is a digital thermometer with a probe at each end of the vivarium so you can verify your temperature gradient is correct once everything's running. The Inkbird or Zoo Med dual-probe thermometers are both inexpensive and accurate. That's genuinely the complete setup — T5 ProT5 12% kit, 100W ceramic on a Habistat pulse stat, and a dual thermometer to confirm it's working.