Do Leopard Geckos Need UVB?
A Clear Guide for Keepers
Leopard geckos are one of the most popular reptile pets—and for good reason. They’re friendly, hardy, and relatively easy to care for. But one question continues to spark debate among keepers:
Do leopard geckos actually need UVB?
The short answer:
While leopard geckos can survive without UVB, they thrive with it.
Let’s break down why UVB is beneficial, how to use it safely, and what setup works best for your gecko.
What Does UVB Do for Leopard Geckos?
Although leopard geckos are crepuscular (most active at dawn and dusk), they are still exposed to low levels of natural sunlight in the wild. UVB lighting plays several important roles:
1. Supports Vitamin D3 Synthesis
UVB helps geckos produce vitamin D3 naturally, which allows their bodies to absorb calcium properly.
Without it, they may develop:
- Weak bones
- Metabolic bone disease (MBD)
- Lethargy or poor appetite
A small amount of UVB goes a long way for long-term health.
2. Improves Activity and Appetite
Many keepers notice that geckos with proper UVB become:
- More active
- More curious
- More consistent with feeding
UVB helps regulate natural biological rhythms, which can improve overall well-being.
3. Mimics Natural Light Cycles
Even if geckos avoid bright sunlight in the wild, they still benefit from gentle daylight exposure.
A low-intensity UVB setup creates a more natural, healthier environment.
How Much UVB Do Leopard Geckos Need?
Leopard geckos do not require strong desert-style UVB. Instead, they do best with low-level UVB, such as:
- 2.0–5.0 UVB range (or Zone 1–2 on Ferguson zones)
- Mounted 10–12 inches above the main basking area
- With a partial shade gradient so they can choose their comfort level
A safe, gentle UVB allows geckos to self-regulate just as they would in nature.
How Long Should UVB Stay On Each Day?
A standard schedule works best:
- 10–12 hours per day
- Off during the night to maintain natural day-night cycles
Pairing UVB with a warm basking spot makes the habitat more natural and comfortable.
Common Myths About Leopard Gecko UVB
❌ Myth: “They’re nocturnal, so they don’t need UVB.”
They are crepuscular—not nocturnal. In the wild, they are exposed to morning and evening UVB.
❌ Myth: “Supplement powder replaces UVB completely.”
Calcium + D3 supplements help, but UVB provides the most natural and consistent absorption.
❌ Myth: “UVB harms leopard geckos.”
Incorrect setup can cause issues, but low-level UVB at the right distance is entirely safe.
Choosing the Right UVB Light
When selecting UVB lighting for leopard geckos, look for:
- Low-intensity UVB (2.0–5.0)
- A strip light design for better coverage
- Stable, flicker-free illumination
A light that keeps both basking and cool zones consistent
If your enclosure has hiding spots, branches, and rocks, UVB exposure becomes even more natural and self-regulated.
So… Do Leopard Geckos Need UVB?
They don’t strictly “need” it to survive.
But they absolutely benefit from it to thrive.
Providing UVB helps support:
✔ Strong bones
✔ Better nutrient absorption
✔ Increased activity and appetite
✔ A more natural, enriched environment
If you want your leopard gecko to enjoy the healthiest, happiest life possible, adding gentle UVB is one of the best upgrades you can make.
