Hermann tortoise hatchling lighting setup

Getting heating and UV lighting right is the single most important factor in reptile health — the majority of common illnesses, including metabolic bone disease and respiratory infections, trace directly back to incorrect temperatures or insufficient UVB. This is especially true for tortoises, where mistakes in the first months cause skeletal damage that can't be undone. To get you set up correctly from day one: what species are you getting, what size enclosure are you working with, and do you have anything in place already?

Perfect starting point — a 90x60 tortoise table is a solid size for a hatchling and gives you good room to create a proper thermal gradient. Hermann's tortoises are Mediterranean species, so they need a basking spot of around 32–35°C, a cool end around 20–22°C, and strong UVB. The UVB is non-negotiable: without it, hatchlings cannot metabolise calcium and will develop metabolic bone disease within months even on a perfect diet. Can I ask — are you planning to keep this tortoise indoors full-time, or will it get outdoor access in summer?

Then you need a reliable indoor UVB source as your primary setup, which is the right call. For a Hermann's hatchling on a 90cm table, I'd recommend the Arcadia T5 HO 12% UVB 54W Forest Canopy Kit — it's the go-to for Mediterranean tortoises kept indoors. The 12% output replicates the UV index a wild Hermann's experiences in southern Europe, and the T5 HO tube gives you the intensity and spread to cover the whole table properly. Pair it with a separate 75W halogen flood bulb for the basking spot and you have everything the tortoise needs. The Arcadia kit comes with the controller unit and tube together, so there's nothing extra to source. Mount the UVB tube at around 30–35cm above the tortoise for correct UV index at ground level, and run it on a 12-hour timer.

Arcadia rates their T5 tubes at 12 months of daily use — after that the UVB output drops significantly even though the tube still produces visible light, so you can't judge by eye. Mark the date when you install it and replace it at 12 months regardless of how it looks. It's the single most common mistake tortoise keepers make: assuming the light is fine because it's still on. A spent tube providing zero effective UVB while the owner thinks everything is covered is exactly how MBD develops silently over a winter.

That covers the critical lighting side completely. The one additional thing worth having from day one is a good digital thermometer with a probe so you can verify your basking spot temperature accurately — a cheap infrared gun also works well for spot-checking. Substrate and diet matter too, but on the heating and lighting front you're fully covered with that combination. You're setting this tortoise up far better than most people do from the start.