Do Dart Frogs Really Need UVB?
Short answer: not strictly — but low-level UVB can benefit dart frogs when used correctly.
In the wild, dart frogs live in shaded rainforest but still receive filtered UVB through canopy gaps. This helps regulate:
- Calcium metabolism via vitamin D₃ synthesis
- Immune function
- Skin health & colouration
When UVB Helps in Captivity
- In breeding groups or with egg-laying females (higher calcium demands)
- Where frogs don’t consume enough supplement powder
- In large, planted setups with dense cover
- For wild-caught imports adjusting to artificial conditions
Risks of Too Much UVB
Dart frogs are light-sensitive. Overexposure may cause:
- Hiding behaviour or stress
- Skin burn or eye damage
- Inactivity or reduced feeding
☀️ Ideal safe range: 1–2% UVB output from 12–14 inches away, with shaded zones.
Best UVB Options for Dart Frogs
| Type | Strength | Mounting Notes |
|---|---|---|
| Arcadia ShadeDweller 2.5% | Low UVB | Great for 45 cm vivs |
| Exo Terra Natural Light 2.0 | Full-spectrum only | No UVB – good for plant growth |
| Jungle Dawn LED + Arcadia Mini UVB | Custom combo | Separates daylight and UVB |
| T5HO 5% with mesh | Distant canopy tanks | Only if well shaded below |
🛠️ Pair with 3D Printed Light Risers to reduce burn risk and improve airflow.
Lighting Schedules & Photoperiod
| Season | Light Duration | Notes |
|---|---|---|
| Dry Season | 10–11 hours/day | Less misting, shorter daylight simulates winter |
| Wet Season | 12–13 hours/day | Encourages breeding & activity |
| UK Standard | 12 hrs on / 12 hrs off | Perfect year-round balance |
Use smart plugs or timers to automate day-night cycles. Avoid leaving lights on longer than 14 hours — it can stress both frogs and plants.
Best Placement for UVB Fixtures
- Mount outside the mesh lid to reduce intensity
- Angle at 45° for indirect exposure
- Provide shade zones with cork bark, foliage or canopy
- Test levels with a UVB meter (Solarmeter 6.5) if possible
✅ UVB light does not penetrate glass or acrylic — always place above mesh if present.
Complementary Lighting for Plant Growth
LED grow lights (e.g. Jungle Dawn or NICREW) support lush plants like:
- Peperomia, Ficus, Pilea, Begonia, Selaginella
- Mosses, bromeliads, climbing vines
Look for 6,500–7,000K spectrum and combine with UVB for full coverage.
🛒 Browse terrarium plants & lighting gear »
Final Thoughts: Is UVB Required?
No — but it is increasingly recommended in UK best practice, especially for breeders, long-term keepers, or naturalistic setups.
The key is balance:
✅ Low UVB
✅ Reliable photoperiod
✅ Proper placement
✅ Variety in lighting levels
FAQ
Q: Can I keep frogs with only LED lights?
Yes, if you supplement their food consistently with D3+ calcium powders.
Q: How long should UVB bulbs last?
Replace every 9–12 months, even if light is still visible. UVB output drops long before the bulb burns out.
Q: Do I need UVB for froglets?
Not necessarily — most keepers raise froglets under ambient light with strong supplementation.
