Best Crested Gecko Lighting: Complete Setup Guide

If you've ever Googled "do crested geckos need light," you've probably gotten a dozen different answers. It's confusing. Some sources say UVB is essential. Others claim crested geckos do just fine without it. And then there's the whole debate about heat lamps, night lights, and how many hours to run everything.

Here's the truth: getting your crested gecko's lighting right makes a real difference in their long-term health and behavior. And once you understand the basics, it's surprisingly simple to set up.

This guide breaks down exactly what your crested gecko needs — and which products actually deliver.

What Lights Do Crested Geckos Actually Need?

Crested geckos are crepuscular, meaning they're most active at dawn and dusk. In the wild, they live in the rainforests of New Caledonia, where filtered sunlight passes through dense forest canopy.

That background matters because it tells you two things:

• They don't need intense, direct light
• They do benefit from a consistent, natural day/night cycle

At minimum, your crested gecko needs a light source that creates a stable photoperiod — essentially, a timer that mimics natural day and night. But the research on UVB light for crested geckos has advanced a lot in the past decade, and there's now a strong case for doing more than just the bare minimum.

Do Crested Geckos Need UVB Light?

This is the question every new owner asks. The short answer: yes, they benefit from low-level UVB light.

For years, the hobby assumed crested geckos didn't need UVB because they're active at low light levels and survive fine in captivity without it. That's technically true — they can survive. But "survive" isn't the same as "thrive."

Recent research and trusted care resources like Reptifiles confirm that crested geckos naturally receive incidental UVB exposure at dawn and dusk in the wild. Providing low-level UVB in captivity helps them:

• Synthesize Vitamin D3 naturally, instead of relying entirely on supplements
• Maintain stronger bones and a healthier immune system
• Display more natural activity patterns and better coloration
• Potentially live longer, more comfortable lives in captivity

The key word is low-level. You don't want a high-output desert UVB bulb blasting your crested gecko. You want something in the UVI 1.0–2.0 range, which mimics the soft, filtered light they'd get under a rainforest canopy.

Think of it this way: a crested gecko doesn't bask in open sun, but it still gets gentle UV light filtering through the leaves. A low-output UVB bulb replicates that perfectly — without any risk of overexposure.

For a deep dive into specific bulb options and UVI measurements, check out our Best UVB Light for Crested Gecko guide.

The Best Types of UVB Bulbs for Crested Geckos

Not all UVB bulbs are equal. Here's what to know before you buy.

T5 HO vs. T8 Bulbs

These are the two main fluorescent UVB formats you'll find at pet stores and online.

For a standard crested gecko enclosure — typically 18x18x24 inches — a T8 or low-output T5 HO is the right call. You don't need a high-intensity desert setup. A 5.0 or 6% UVB rating is ideal. Avoid 10.0 bulbs — they're too strong for these forest dwellers.

A top pick for crested geckos is the Arcadia Forest 6% T5 UVB bulb, designed specifically for forest reptiles. The Zoo Med ReptiSun 5.0 T8 is a budget-friendly alternative that's widely available and very reliable.

LED Grow Lights for Planted Setups

If you've built a bioactive vivarium with live plants — which crested geckos genuinely thrive in — you'll also want a quality LED grow light. These don't produce UVB, but they keep your plants healthy and give your gecko a naturalistic environment that encourages natural behavior.

A good LED grow light does double duty: it supports plant health and provides the visible light cycle your gecko needs. Look for something in the 2000–5000 lux range for a well-planted enclosure.

All-in-One Lighting Systems

Some newer fixtures combine visible light and UVB in a single clean unit. The Arcadia Jungle Dawn LED Bar paired with a UVB tube is a popular combination. It's cleaner looking and easier to manage than running multiple separate fixtures.

Do Crested Geckos Need a Basking Light?

Here's where people often overcomplicate things. Crested geckos don't need a traditional basking light the way bearded dragons or blue-tongue skinks do.

Crested geckos are far more temperature-sensitive than desert reptiles. They thrive between 68–80°F (20–27°C), with an ideal range around 72–75°F. Anything consistently above 82–85°F can cause heat stress — and in extreme cases, be fatal.

Most homes naturally stay within their comfort range without added heat. If your home drops below 65°F at night, you might need a small heat source — but it should be gentle and thermostat-controlled, not a hot basking lamp.

If supplemental heat is needed, good options include:

• A low-wattage incandescent bulb (25W or less) run on a thermostat during the day
• A ceramic heat emitter — produces heat with no light output, great for nighttime warmth
• A small radiant heat panel mounted inside the enclosure

Always use a thermostat. Crested geckos can't self-regulate against excess heat the way desert species can. Without thermostat control, even a small bulb can overheat a vivarium quickly.

For everything you need to know about temperature management, our Crested Gecko Temperature Requirements guide covers it in detail.

Do Crested Geckos Need Light at Night?

No — and adding nighttime lighting can actually harm them.

Colored bulbs marketed as "night view" lights, especially red or blue ones, were once thought to be invisible to reptiles. We now know that's not accurate. Most reptiles can detect red wavelengths, and running a night light can disrupt your gecko's sleep cycle, suppress natural nocturnal activity, and raise stress levels over time.

The best approach: complete darkness at night. Use a timer to turn off all lights when your room gets dark. Your crested gecko will be more active, more relaxed, and far less stressed.

If you need to observe your gecko after dark, a brief look with a dim flashlight is fine. Just keep nighttime disturbances minimal — crested geckos are most active in the first couple of hours after lights go out.

Setting Up the Right Light Cycle

Crested geckos benefit from a photoperiod that shifts with the seasons. Here's a simple schedule to follow:

You don't need to be exact to the minute. The goal is a gradual shift in light hours across the year — about 30 minutes every few weeks as seasons change. This supports natural hormonal cycles, reduces stress, and can even encourage breeding behavior later on if you're interested.

The easiest way to manage it: a digital outlet timer. Set it to your target photoperiod and adjust it every few weeks. It takes about 60 seconds to update and makes a measurable difference in your gecko's overall wellbeing.

How to Position Your Lights

Placement matters, especially with UVB. Here are the key rules:

• UVB tube: Mount it inside or directly on top of a mesh lid. Keep it at least 6–8 inches above your gecko's favorite daytime resting spots. If you want precision, use a Solarmeter 6.5 to measure UVI at different heights — it's the gold standard tool for this.
• Visible light or grow light: Position it to cover the full enclosure evenly. Avoid hot spots and deep shadows that would leave plants struggling.
• Heat source (if needed): Mount it at the top and place a thermostat probe at mid-enclosure level to get an accurate ambient temperature reading.

One thing to avoid: glass lids. Glass blocks UVB almost completely. Mesh lids are standard for crested geckos anyway because of their ventilation requirements — and they work perfectly for overhead lighting.

Lighting for Bioactive Enclosures

If you're running a bioactive vivarium, your lighting setup needs a slight upgrade — but it's absolutely worth it.

Live plants need adequate light to photosynthesize. Common low-light tropical species like pothos, bromeliads, and dwarf ficus can get by with a quality LED grow light running 10–14 hours a day. If you want denser growth or more demanding plant species, look for a fixture in the 3000–5000 lux range.

Here's the good news: a quality LED grow light does double duty. It keeps your plants alive and provides the visible light cycle your gecko depends on. Pair it with a low-output UVB tube on the same timer, and you've got a complete, naturalistic lighting system that mostly manages itself.

For a full walkthrough of building the perfect crested gecko habitat, our Crested Gecko Care: The Complete Beginner's Guide covers enclosure setup from the ground up.

What About Full-Spectrum Bulbs?

Full-spectrum bulbs are marketed as replicating natural sunlight. They're not the same as UVB bulbs, and it's important to understand the difference.

Most full-spectrum LEDs produce a broad visible light spectrum — great for color rendering and plant support — but produce little or no actual UVB output. They're excellent as a primary visible light source. But don't count on them for UVB.

If you want your crested gecko to get genuine UVB benefits, use a bulb with a specific, measured UVB output rating. Look for a stated UV Index value or UVB percentage, not just "full spectrum" marketing language.

Complete Crested Gecko Lighting Setup at a Glance

Here's everything you need in one simple table:

Keep it simple. A low-output UVB tube, a quality LED for visible light and plant growth, and a digital timer — that covers everything most crested geckos need. Add a thermostat if your home runs cool in winter.

Getting your crested gecko's lighting right is one of the highest-impact, lowest-cost upgrades you can make for their long-term health. A proper UVB setup and a basic timer cost less than a single vet visit — and they'll help you avoid needing one.