Best basking bulbs for bearded dragons

Three decisions, in order

1. Heat type. Halogen or incandescent, not ceramic. The reason is the infrared band: halogen produces more Infrared-A, which penetrates tissue rather than just warming the surface, and that is what a basking animal is actually using when it sits under a lamp. A ceramic emitter produces a weaker spectrum for this purpose. Both get hot; only one of them is a good basking lamp.

2. Control. A dimming or pulse thermostat, with the probe at the basking surface. An on/off thermostat switching a filament lamp gives an animal a cycle of too hot and too cold with a brief correct moment in between, and shortens the lamp's life while it does it. How thermostats work covers why the control type has to match the heat source, and do I need a thermostat for a bearded dragon answers the question directly.

3. Wattage, last and by measurement. This is the step everyone wants to do first, and it cannot be done from a chart. Wattage interacts with mount distance, enclosure height, ambient room temperature and the basking platform material. The published target is a surface temperature - 108-113 F (42-45 C) surface temperature per the care reference - and the only way to hit it is to measure the surface.

The figure you are aiming at

Note what the basking figure is measured on: a surface, not the air. An air thermometer dangling at mid-height tells you almost nothing about whether the basking rock is at temperature. Use an infrared temperature gun pointed at the spot the animal actually sits on. How to measure basking temperature is the method, and it takes about a minute.

How to set the wattage without guessing

Install the lamp at the mount height your enclosure gives you. Let it run for 45 minutes with the enclosure closed, because a basking surface takes that long to stabilize. Point an infrared gun at the surface. Then adjust: if it is under the band, go up one wattage step or lower the lamp; if it is over, dim it on the thermostat or step the wattage down. The wattage ladder on the Zoo Med spot - eight steps from 25 W to 250 W - exists precisely so this can be done by substitution rather than by moving fixtures. What wattage heat bulb for a reptile works through the arithmetic for every enclosure size.

What not to buy

Coloured night bulbs. Red and blue lamps are sold for night heat and they emit visible light, which is the one thing a night heat source must not do. If the room drops below 55-75 F, use a ceramic emitter on a thermostat. Night lighting mistakes covers it.

Compact coil "basking" lamps. A coil concentrates output at a point rather than across a zone, and the UVB versions of this format have a history of problems. For heat, a spot in a dome is the correct shape.

Any lamp without a guard where the animal can reach it. A dragon that can climb to a bulb will touch it. The fixture needs a cage, and that applies to every lamp on this page. Heat lamp fire safety covers the fixture side, including the cable routing that causes most incidents.

Where this fits in the setup

A complete dragon enclosure runs three systems that must not be confused: UVB for vitamin D synthesis, overhead halogen for basking heat, and - only in a cold room - a lightless ambient source overnight. Each one needs its own lamp, and the heat sources need their own thermostat. Bearded dragon basking setup is the build guide for the basking end specifically, and bearded dragon temperature and humidity is the whole thermal picture. For the cross-species heat roundup, see best reptile heat sources.