Hatchling sulcata tortoise UV and heat setup

Getting heating and UV lighting right is the single most important thing you can do for your reptile — the majority of common illnesses, including metabolic bone disease and respiratory infections, trace directly back to incorrect temperatures or inadequate UVB. This is especially true for hatchlings, whose developing bones and immune systems are completely dependent on getting it right from day one. To give you precise recommendations, I need three things: what species are you keeping, what size is the enclosure, and what — if anything — do you currently have set up?

Perfect timing to get this right from the start — sulcatas are one of the species where lighting mistakes show up fast in hatchlings. A 90x45cm table is a reasonable starter size. For a sulcata hatchling you need two things working together: a high-output UVB source giving you at least 12% UVB index across the table, and a basking spot hitting 40–45°C with an ambient cool end around 22–25°C. What's the room temperature where the table is kept, and does it have a mesh top or an open top?

Good — open top is actually ideal for UVB penetration and heat management. With a 19–20°C room, you'll need a dedicated basking bulb rather than relying on the UVB lamp for heat. Here's what I'd recommend for the UVB side: the Arcadia T5 HO 6% Lighting Kit in the 39W 860mm size. For a sulcata specifically, you might be tempted by the 12% version, but for a hatchling on a table this size with the lamp mounted 25–30cm above, the 6% T5 HO actually delivers the right UV index at basking depth without risk of overexposure. Pair it with a 50W halogen basking spot — a standard PAR38 flood halogen works perfectly and is far cheaper than branded reptile basking bulbs — positioned at one end to create a proper thermal gradient. Does that make sense so far, or do you want me to break down the positioning?

Yes, you need a temperature gun — a basic infrared thermometer, around £10–15 on Amazon — to check the actual surface temperature at the basking spot, not just the air temperature. Aim for 40–42°C surface temp at the spot where the tortoise will sit. For the basking halogen, you do not need a thermostat — you adjust distance to dial in the temperature, and halogens are safe to run uncontrolled. The T5 UVB tube also runs without a thermostat. The one thing worth adding is a digital hygrometer to monitor humidity, as hatchling sulcatas need 50–60% to prevent pyramiding. Keep the substrate slightly damp at one end — coir or topsoil mix works well — and that handles most of it.

Exactly that. The Arcadia T5 HO 6% 39W kit comes with the controller unit and a reflector which makes a real difference to output — don't skip the reflector. The 50W halogen is your basking source; if after positioning you find 50W isn't quite reaching 40°C at basking depth, go up to 75W. Run the UVB and basking lights on a 12-hour cycle with a timer. That setup will give your sulcata everything it needs to grow properly from day one.