Tokay Gecko Lighting: Temperature, Night Drop, and UVB

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Tokay gecko lighting confuses a lot of new keepers. The animal sleeps through the day and hunts at night. That schedule does not mean heat and light can be skipped.

A tokay still needs a warm basking zone, a cooler retreat, and a real night drop. It needs some UVB too, even though it rarely suns itself the way a bearded dragon does.

This guide covers tokay gecko temperature ranges by time of day. It covers the heat sources that work for a nocturnal, arboreal lizard. It also covers how much UVB the species actually needs, and where sources disagree.

Why Heating and Lighting Still Matter for a Nocturnal Gecko

Tokay geckos are nocturnal and arboreal. They spend daylight hours tucked into bark crevices, cork tubes, or dense foliage. That behavior can make lighting feel optional, but it is not.

The gecko still needs a thermal gradient to digest food. It also needs a day and night cycle to keep its internal clock working. Tokay gecko heat requirements exist even without a visible basking display.

The gecko regulates body temperature by moving between warmer and cooler zones. It does this the same way a diurnal lizard does, just without sitting under a bright spotlight. Getting the gradient wrong shows up as poor appetite or sluggish digestion.

Tokay Gecko Temperature Requirements by Time of Day

Care sources differ on exact numbers. Specialist keeper guides list a basking surface of 90 to 100°F. They give a cooler zone of 80 to 85°F and a night range of 76 to 80°F.

The veterinary reviewed PetMD care sheet gives a slightly higher basking range of 90 to 105°F. Its daytime cool zone matches at 80 to 85°F. It adds that the night reading should not drop below 75°F.

A care guide from Orange Grove Animal Hospital, a veterinary clinic, takes a different position. It describes a lower daytime ambient of 78 to 85°F, with no daytime basking light required at all. That source treats the tokay as a species that does not sun bask.

That same guide recommends a nighttime ambient of 74 to 80°F, using a heat source that runs only after dark. Because sources disagree on the daytime basking spot, a workable middle ground exists. Keep a warm side in the low 90s and a cool side in the low to mid 80s during the day.

Either approach can work. The gecko needs room to choose its own spot. It should never sit in still air above the mid 90s for long stretches.

Creating a Real Night Time Drop

A tokay gecko hunts and feeds mostly after dark. That does not mean the enclosure should stay at daytime heat around the clock. A drop into the mid to upper 70s Fahrenheit overnight is normal.

Every source reviewed here agrees on that night drop. Room temperature alone is sometimes enough to reach that range in a warm home. Many keepers still run a dedicated night heat source instead, to keep the drop under real control.

The key is a genuine difference between day and night readings. A flat temperature that never changes defeats the purpose. A digital thermometer probe left in the enclosure overnight confirms whether the night range is actually being hit.

Tokay Gecko Heat Sources

Daytime heat, where a keeper chooses to provide it, typically comes from an overhead halogen or basking bulb. It should sit above a screen top, aimed at a branch or cork bark perch. Open floor space is not the target zone.

Under tank heaters are a poor fit for this species. A tokay is mostly arboreal and spends little time on the substrate. Nighttime heat is where tokay geckos differ most from diurnal lizards.

The same veterinary guide recommends a nighttime only heat bulb. It names an infrared bulb or a ceramic heat emitter as suitable options. Neither one produces visible light that could disrupt nocturnal activity.

Any heat bulb, day or night, should warm only one section of the enclosure. That keeps a genuine cool zone available at all times. It also lets the gecko retreat from heat entirely if it chooses to.

• Daytime option: an overhead halogen or basking bulb over a perch, used only if following the higher basking ranges above
• Nighttime option: an infrared bulb or a ceramic heat emitter, since both heat without emitting visible light
• Avoided: under tank heaters and heat rocks, since a mostly arboreal gecko gets little benefit and burn risk is higher

Thermostats and Monitoring

Any heat bulb strong enough to reach basking range needs a thermostat, such as the Exo Terra Dimming and Pulse Proportional Thermostat. Wire it between the bulb and the outlet. Running the bulb on a timer alone, or with no control, risks a sustained overheat.

A small, thin skinned gecko cannot escape a stuck heat source inside a closed enclosure. A dimming or pulse proportional thermostat suits a halogen bulb or ceramic emitter well. It holds a steadier temperature than a basic on and off model.

Place the thermostat probe near the heat source itself. Pair it with a separate digital thermometer at gecko level. That second reading confirms the actual basking surface temperature, not just the air near the bulb.

UVB Lighting for a Nocturnal Species

Tokay geckos are nocturnal, so UVB needs run lower than for a basking diurnal lizard. Sources still disagree on whether UVB can be skipped entirely. Specialist keeper guides recommend a low output UVB tube, such as the Arcadia ProT5 Kit Forest 6%, for this species.

A 5.0 type T8 tube or a low output arboreal UVB kit is the usual choice. The target is a UV Index of about 1.0 to 2.0 in the gecko’s basking or resting area. That is a modest dose compared to a desert lizard’s setup.

The Merck Veterinary Manual gives the physiology behind that target. Vitamin D synthesis in reptile skin peaks at wavelengths of 283 to 304 nanometers. Merck cites 30 to 120 minutes of daily exposure as sufficient for standard fluorescent UVB bulbs, which is easy to meet with a tube over exposed perches.

The veterinary guide reaches a similar conclusion. It describes the species as needing only minimal UVB exposure. It recommends a moderate output 5.0 type fluorescent bulb.

That bulb should sit within about 18 inches of the gecko’s hiding spots. No glass or plastic barrier should sit between the bulb and the gecko. PetMD takes a more permissive stance, framing UVB as beneficial rather than mandatory.

It notes UVB supports the day and night cycle and vitamin D synthesis. It adds that UVB is not strictly required if dietary vitamin D3 supplementation is adequate. Bulb placement matters more than wattage for this species.

A tokay spends daylight hours hidden in a crevice or tube rather than out in the open. The fixture should run close enough to any exposed perches. That way the gecko still gets some exposure when it does move during the day.

Bulb Replacement Schedule

UVB output fades well before a bulb stops producing visible light. Visual inspection alone will not catch a bulb that has gone dark in UV terms. Specialist keeper guides recommend replacing the UVB tube every 12 months on a fixed schedule, and the Merck Veterinary Manual also lists annual replacement.

PetMD recommends a shorter six month replacement cycle instead. A UV index meter settles the question for any individual bulb, and the shorter interval is the safer default without one. An expired UVB bulb still looks identical to a fresh one under normal room light.

Photoperiod and the Day Night Cycle

A consistent light cycle helps a tokay gecko keep a stable internal clock. This matters even though the animal sleeps through most of the lit hours. Veterinary guidance calls for roughly 10 to 12 hours of light exposure daily.

Time that light to a normal day and night pattern, not left on continuously. A basic outlet timer keeps the UVB tube on a fixed schedule. It works for any daytime heat bulb too, without relying on a keeper to remember it every morning.

Running lights around the clock removes the day and night contrast. That contrast is something the gecko’s biology depends on.

Common Tokay Gecko Lighting Mistakes

The most common mistake is treating a nocturnal gecko like a sun basking lizard. That means a bright daytime heat bulb with no night drop at all. A flat, unchanging temperature removes the gecko’s ability to choose its own thermal zone.

A second common mistake is skipping UVB entirely, since the species is nocturnal. Most current care sheets still call for some UVB exposure. That includes both the specialist keeper guides and the veterinary guidance reviewed here.

Using a visible light bulb overnight is a third mistake worth avoiding. A white or colored nighttime bulb can disrupt normal nocturnal behavior. Infrared and ceramic heat emitters exist as heat only alternatives for exactly this reason.

Related Tokay Gecko Care

Heating and lighting work alongside the rest of the enclosure. Humidity, dimensions, and climbing structure are covered on the tokay gecko housing guide. Heat and humidity interact closely in a species that needs both a warm gradient and 60 to 80 percent humidity.

Feeding schedule, prey items, and supplementation appear on the tokay gecko diet page. Territorial behavior, the species’ loud call, and its defensive bite are covered on the tokay gecko behavior page.

Breeding season timing and egg care appear on the tokay gecko breeding guide. For the full picture, the tokay gecko care guide ties every element together. The tokay gecko species overview covers identification and general background.

Frequently Asked Questions

Does a tokay gecko need a daytime basking light?

Sources disagree. Keeper guides and PetMD recommend a daytime basking spot around 90 to 105°F, while one veterinary care guide describes the species as not needing a daytime basking light at all.

What temperature should a tokay gecko be at night?

Most sources agree on a night range in the mid to upper 70s Fahrenheit. Keeper guides cite 76 to 80°F and a veterinary source cites 74 to 80°F. Neither advises letting the enclosure drop below about 75°F overnight.

Does tokay gecko lighting need UVB if the species is nocturnal?

Most current care guidance still recommends a low output UVB bulb, targeting a UV Index of about 1.0 to 2.0. Some veterinary guidance allows skipping UVB if dietary vitamin D3 supplementation is sufficient, but including it is the safer default.

What is the best nighttime heat source for a tokay gecko?

An infrared bulb or a ceramic heat emitter work well, since neither produces visible light that would disrupt nocturnal activity. Both should run on a thermostat to prevent overheating a small enclosure.

How often should a tokay gecko’s UVB bulb be replaced?

Replacement schedules range from every six months to every 12 months, depending on the source. The bulb keeps producing visible light long after its UV output actually fades.

Can a tokay gecko overheat under a basking bulb?

Yes, which is why any basking or heat emitter bulb needs a thermostat. It should also warm only part of the enclosure. A digital thermometer at gecko level confirms the true surface temperature.