
Would a UVB Light Grow Plants in a Terrarium?
Yes, but it needs to be used carefully.
How UVB light affects plants
Benefits: UVB light can help some plants grow taller and produce more biomass. It can also boost photosynthesis and growth hormones.
Risks: Too much or too long exposure to UVB can burn leaves, reduce photosynthesis, and slow growth.

Choosing the right plants
Succulents and cacti: These thrive in strong light and can handle UVB well.
Ferns and mosses: These prefer high humidity and moderate light, and UVB might damage their delicate leaves.
Tips for using UVB lamps
Combine with other lights: UVB lamps shouldn’t be the only light source. Plants need full-spectrum light, including visible and infrared light, for healthy growth. Pair UVB lamps with LED grow lights for the best results.
Control intensity and duration: Use moderate UVB intensity and provide 12–14 hours of light daily to mimic natural day-night cycles.
Safety precautions: UVB light can harm humans and animals, so avoid direct exposure and use the lamp safely.
Example application
Exo Terra TerraSky UV LED lamp: This lamp provides UVB light and supports both plant growth and reptile health. It has adjustable light settings and a timer, making it suitable for growing orchids, bromeliads, carnivorous plants, or mosses.
Conclusion
UVB lamps can be used for growing plants in a terrarium, but they should be paired with other light sources, and you need to control their intensity and duration. Choosing plants that tolerate UVB light is also key to success.