Best Reptile Heat Lamp for Bearded Dragons 2026 — Temps, UVB & Setup

Q: "What temperature does a bearded dragon need?"

"Bearded dragons need a temperature gradient: basking spot 100-110°F (38-43°C), warm side 85-90°F (29-32°C), cool side 75-80°F (24-27°C). Nighttime can drop to 65-70°F (18-21°C) — no night heat needed unless your home drops below 65°F. Use digital thermometers with probes at each zone; stick-on dial thermometers are notoriously inaccurate (often off by 10-20°F)."

Q: "Do bearded dragons need UVB light?"

"Absolutely — UVB is non-negotiable and more critical than heat. Without UVB, bearded dragons cannot synthesize vitamin D3, leading to metabolic bone disease (MBD) — soft/deformed bones, tremors, and death. Use a linear T5 HO UVB tube (Arcadia 12% or Zoo Med T5 10.0) spanning 2/3 of the enclosure. Coil UVB bulbs are inadequate — they produce a narrow, weak beam. Replace T5 tubes every 12 months (output degrades invisibly)."

Q: "Can I use a regular light bulb as a heat lamp for my bearded dragon?"

"A plain incandescent or halogen flood bulb works fine as a heat source — reptiles don't care about branding, only temperature. What matters: it must be a flood (wide beam), not a spot (narrow beam creates dangerous hot spots), and you must verify temperatures with a probe thermometer. However, avoid LED bulbs (no heat output) and colored bulbs marketed as 'night' lights (disrupt sleep cycles)."

Q: "How far should the heat lamp be from my bearded dragon?"

"Distance depends on wattage and bulb type — there's no universal answer. Start with the basking bulb 8-12 inches above the basking platform, then measure the surface temperature with a digital probe or infrared temp gun. Adjust distance until the basking surface reads 100-110°F. The dragon should be able to sit under the beam without touching the bulb or fixture."

Q: "Do bearded dragons need heat at night?"

"Usually no. Bearded dragons tolerate nighttime drops to 65°F (18°C) — this mimics their natural Australian desert habitat. If your home drops below 65°F at night, use a ceramic heat emitter (CHE) — it produces heat with zero light, so it won't disrupt their sleep cycle. Never use colored 'night' bulbs (red/blue/purple) — reptiles can see this light and it disrupts circadian rhythms."

Bearded dragon cold or lethargic? The right heat + UVB setup is life-or-death. 4 best heat lamps, exact temperature targets, and the UVB guide.

By Whisker & Wag Research Team· Published Oct 18, 2026 ·5 min read

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Bearded dragon basking under heat lamp with proper temperature gradient — Illustration for Whisker & Wag

A bearded dragon with wrong temperatures doesn’t just get uncomfortable — it stops digesting food, stops being active, and develops metabolic bone disease. Heating and lighting are the single most important (and most commonly botched) part of bearded dragon care.

Quick answer: You need two separate systems: (1) a basking heat lamp for the hot spot (100-110°F) — the Fluker’s Basking Spotlight or a plain halogen flood bulb works; and (2) a linear T5 HO UVB tube (Arcadia 12% or Zoo Med 10.0) spanning most of the tank. UVB is more critical than the heat brand. Details and exact setup below.

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The two systems (don’t confuse them)

Beginners often buy one “reptile bulb” and think they’re done. You need two independent systems:

Heat (basking lamp): Creates the temperature gradient. Affects digestion, activity, immune function.
UVB (fluorescent tube): Enables vitamin D3 synthesis. Prevents metabolic bone disease. A heat lamp does NOT provide UVB. A UVB tube does NOT provide meaningful heat.

Both must be correct. A dragon with perfect heat but no UVB will still develop MBD and die.

Temperature targets (memorize these)

Zone	Target	How to measure
Basking surface	100-110°F (38-43°C)	Probe on the basking rock/platform
Warm side air	85-90°F (29-32°C)	Probe 4" above substrate
Cool side air	75-80°F (24-27°C)	Probe 4" above substrate
Nighttime	65-70°F (18-21°C)	No heat needed above 65°F

Measure with: Digital probe thermometers (probe thermometers , ~$10 each — you need 2-3) or an infrared temp gun for surface temps. Do not trust stick-on dial thermometers — they’re routinely 10-20°F off, which is the difference between healthy and dead.

The 4 best heat lamps

1. Fluker’s Basking Spotlight Bulb — Best dedicated basking bulb

Fluker’s Basking Spotlight at Chewy

Wattages: 75W, 100W, 150W
Type: Incandescent flood
Price: ~$10-14

Why it’s the standard: Consistent output, proper flood beam pattern, available everywhere. The 100W works for most 40-gallon setups in normal room temperatures. Start here unless you have a specific reason not to.

2. Philips Halogen Flood Bulb — Best budget (hardware store)

Wattages: 75W, 90W (PAR38 flood)
Type: Halogen flood (NOT spot)
Price: ~$8 for a 2-pack at any hardware store

Why it works: Reptiles don’t read labels. A halogen flood bulb produces the same heat spectrum as a “reptile” basking bulb at half the price. The key word is flood — wide beam. Avoid “spot” bulbs (narrow beam = dangerous hotspot). This is what many experienced keepers actually use.

3. Zoo Med Repti Basking Spot Lamp — Best widely available

Zoo Med Basking Spot at Chewy

Wattages: 75W, 100W, 150W
Type: Incandescent spot/flood
Price: ~$12

Why it’s here: Available in every pet store in America. If your bulb burns out on a Sunday, this is what you’ll find. Reliable, consistent.

4. Ceramic Heat Emitter (CHE) — Best for nighttime/supplemental

Ceramic Heat Emitter at Chewy

Wattages: 60W, 100W, 150W
Type: Ceramic (heat only, zero light)
Price: ~$15-20

When you need it: Nighttime heat (if home drops below 65°F) or supplemental ambient heat in cold rooms. Screws into a standard dome fixture. Lasts years (no filament to burn out). Must be paired with a thermostat — CHEs get extremely hot.

The UVB setup (more important than heat brand)

Buy: Arcadia ProT5 Kit (12% UVB) or Zoo Med ReptiSun T5 HO (10.0). Linear tube, NOT coil.

Arcadia ProT5 Kit at Chewy

Setup rules:

Length: 2/3 of enclosure length (24" tube for a 40-gallon breeder)
Position: Overlapping the basking zone (heat + UVB together mimics the sun)
Distance: 12-18" from basking platform (check manufacturer’s chart — varies by bulb and whether there’s mesh)
Mesh warning: Screen tops block 30-40% of UVB. Either mount inside the tank or account for the loss.
Replacement: Every 12 months for T5 HO (output degrades invisibly — the tube still glows but produces no UVB)

Why not coil bulbs: Coil/compacts produce a narrow cone of UVB directly below the bulb. The dragon gets UVB on a 6-inch circle and nothing elsewhere. Linear tubes provide a wide, even gradient. This is the consensus of reptile veterinarians.

Complete setup checklist

Enclosure: 40-gallon breeder minimum (36" x 18") for an adult — bigger is better
Basking bulb in dome fixture on one end
Linear T5 HO UVB tube (2/3 of tank length)
2-3 digital probe thermometers (basking surface, warm air, cool air)
Thermostat for CHE (if using nighttime heat)
Timer for lights (12-14 hours on, 10-12 hours off — consistent photoperiod)
Basking platform (flat rock or wood — holds heat)
Hides on both warm and cool sides

Common deadly mistakes

No UVB, only heat — #1 killer. MBD is irreversible once advanced.
Coil UVB instead of linear — inadequate coverage, false sense of security.
Colored night bulbs — disrupts sleep, causes chronic stress. Use CHE or nothing.
Stick-on thermometers — dangerously inaccurate. Use probes.
Heat rock — unregulated heating elements cause severe burns. Never use them.
No temperature gradient — the whole tank one temperature means the dragon can’t thermoregulate.

FAQ

What temperature does a bearded dragon need? Basking 100-110°F, warm side 85-90°F, cool side 75-80°F, nighttime 65-70°F. Measure with probe thermometers, not stick-on dials.

Do bearded dragons need UVB light? Absolutely — it’s non-negotiable. Without UVB, they develop metabolic bone disease and die. Use a linear T5 HO tube (Arcadia 12% or Zoo Med 10.0), not a coil bulb.

Can I use a regular light bulb as a heat lamp? Yes — a halogen flood bulb from a hardware store works identically to branded reptile bulbs. Must be flood (not spot), and verify temps with a probe.

How far should the heat lamp be from my bearded dragon? Start 8-12" above the basking platform, then adjust until a probe reads 100-110°F on the surface. Distance varies by wattage.

Do bearded dragons need heat at night? No, unless your home drops below 65°F. Use a ceramic heat emitter (no light) if needed. Never use colored night bulbs.

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Frequently asked questions

What temperature does a bearded dragon need?

Bearded dragons need a temperature gradient: basking spot 100-110°F (38-43°C), warm side 85-90°F (29-32°C), cool side 75-80°F (24-27°C). Nighttime can drop to 65-70°F (18-21°C) — no night heat needed unless your home drops below 65°F. Use digital thermometers with probes at each zone; stick-on dial thermometers are notoriously inaccurate (often off by 10-20°F).

Do bearded dragons need UVB light?

Absolutely — UVB is non-negotiable and more critical than heat. Without UVB, bearded dragons cannot synthesize vitamin D3, leading to metabolic bone disease (MBD) — soft/deformed bones, tremors, and death. Use a linear T5 HO UVB tube (Arcadia 12% or Zoo Med T5 10.0) spanning 2/3 of the enclosure. Coil UVB bulbs are inadequate — they produce a narrow, weak beam. Replace T5 tubes every 12 months (output degrades invisibly).

Can I use a regular light bulb as a heat lamp for my bearded dragon?

A plain incandescent or halogen flood bulb works fine as a heat source — reptiles don’t care about branding, only temperature. What matters: it must be a flood (wide beam), not a spot (narrow beam creates dangerous hot spots), and you must verify temperatures with a probe thermometer. However, avoid LED bulbs (no heat output) and colored bulbs marketed as ’night’ lights (disrupt sleep cycles).

How far should the heat lamp be from my bearded dragon?

Distance depends on wattage and bulb type — there’s no universal answer. Start with the basking bulb 8-12 inches above the basking platform, then measure the surface temperature with a digital probe or infrared temp gun. Adjust distance until the basking surface reads 100-110°F. The dragon should be able to sit under the beam without touching the bulb or fixture.

Do bearded dragons need heat at night?

Usually no. Bearded dragons tolerate nighttime drops to 65°F (18°C) — this mimics their natural Australian desert habitat. If your home drops below 65°F at night, use a ceramic heat emitter (CHE) — it produces heat with zero light, so it won’t disrupt their sleep cycle. Never use colored ’night’ bulbs (red/blue/purple) — reptiles can see this light and it disrupts circadian rhythms.