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SESK: Stuff Everyone Should Know · sesk.info/reptile-bearded-dragon-replace-uvb

When does the UC Davis guide say to replace a dragon's UVB bulb?

Replace it every 3 to 6 months.

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  1. Only when it goes dark
  2. Every 3 to 6 months ✔
  3. Every ten years

Why: A bulb can keep glowing after its UVB output has faded. The UC Davis bearded dragon guide specifies replacement every 3 to 6 months.

Huh, didn't know that: Visible brightness does not prove that a lamp still produces enough UVB.

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What did the new bulb announce? It was my time to shine.
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References

Answer: Every 3 to 6 months. A bulb can keep glowing after its UVB output has faded. The UC Davis bearded dragon guide specifies replacement every 3 to 6 months.

  1. Bearded Dragon Care healthtopics.vetmed.ucdavis.edu/health-topics/exotics/bearded-dragon-care
    It must be replaced every 3-6 months, because the UVB fades even though visible light is still emitted.
    Checked 2026-10-11.

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