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

How close should the UC Davis UVB bulb be to a dragon's basking site?

Place it no more than 12 inches away.

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  1. At least 6 feet away
  2. Anywhere in the same room
  3. No more than 12 inches away ✔

Why: UVB gets weaker the farther it travels, so the bulb must be close to where the dragon basks. UC Davis says no more than 12 inches from the basking site.

Huh, didn't know that: UC Davis says the UVB bulb should give no less than 5 percent UVB, as stated on the package.

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Why did the dragon move its perch? It wanted light within reach.
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References

Answer: No more than 12 inches away. UVB gets weaker the farther it travels, so the bulb must be close to where the dragon basks. UC Davis says no more than 12 inches from the basking site.

  1. Bearded Dragon Care healthtopics.vetmed.ucdavis.edu/health-topics/exotics/bearded-dragon-care
    This bulb must be placed no more than 12 inches from the basking site.
    Checked 2026-10-11.

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