Bearded Dragon Heating: Basking Temps & Setup
| Basking temp (hatchling/juvenile) | 100–110°F |
| Basking temp (adult) | 95–105°F |
| Cool side | 75–85°F |
Overhead heat, not belly heat
Unlike some reptiles that rely on substrate warmth, bearded dragons are adapted to intense overhead desert sun and bask directly under a heat source on an elevated perch. A halogen or incandescent basking bulb over a sturdy platform is the correct heat source — under-tank heaters are not a substitute and heat rocks are dangerous.
Temperature by age
Hatchlings and juveniles need the hottest basking spots, around 100–110°F, to fuel rapid growth and digestion. Adults do well slightly cooler, around 95–105°F. In every case, the cool end of the enclosure needs to sit meaningfully lower — roughly 75–85°F — so the dragon can genuinely thermoregulate by moving.
Thermostat is mandatory
A basking bulb run without a thermostat or dimming controller can climb well past safe limits and cause burns or heat stress. Use a pulse-proportional or dimming thermostat, and verify actual surface temperature with a digital probe thermometer — not a stick-on dial gauge, which reads inaccurately.
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A single adult bearded dragon needs a minimum 4ft x 2ft x 2ft enclosure, with 6ft x 2ft x 2ft increasingly recommended as best practice — plus a linear T5 HO UVB tube, an overhead basking bulb on a thermostat, a real thermal gradient, a sturdy basking platform, and a shallow water dish.
A complete bearded dragon setup needs a 4ft+ enclosure, a linear T5 HO UVB tube, an overhead basking bulb on a thermostat, two thermometers, a basking platform, a hide, a shallow water dish, and age-appropriate substrate — all running and stable for at least 48 hours before the dragon arrives.
Hatchlings can start in a 20-gallon long tub, juveniles need to move to roughly a 40-gallon breeder footprint by a few months old, and adults need a minimum 4ft x 2ft x 2ft enclosure, with 6ft x 2ft x 2ft recommended.
Bearded dragons need a linear T5 HO UVB tube at 10.0 or 12% output, running the length of the basking third of the enclosure with nothing between bulb and dragon, replaced every 6–12 months regardless of whether it still produces visible light.
Bearded dragons should be kept at roughly 30–40% ambient humidity. Sustained humidity above 50% significantly raises the risk of respiratory infection in this dry-climate species — brief daily misting or a shallow soak handles hydration and shedding needs without pushing ambient humidity up long-term.
Bearded dragons typically live 8–12 years in captivity with correct husbandry, and well cared-for individuals have been documented living past 15. Obesity, inadequate UVB, and poor temperature accuracy are the biggest preventable factors that shorten lifespan.