Russian tortoise · UVB and shade
Russian tortoise care should include the measured species-appropriate linear UVB gradient below. Preserve complete shade and switch every light off at night.
The amount reaching the tortoise changes with its distance from the lamp and anything positioned between them.
Use the practical checks
The short answer
Russian tortoise care should include the measured species-appropriate linear UVB gradient below. Preserve complete shade and switch every light off at night.
The honest fit
For a russian tortoise, use broad species-appropriate linear UVB over the basking area, installed to the fixture maker's measured distance guidance with complete shade. Group the brighter zone with daytime warmth while preserving dark retreats and foliage or hide cover nearby.
A lamp percentage cannot predict the dose on its own. Follow the fixture maker's distance chart, account for mesh, and measure at the highest place the tortoise can actually reach when possible.
Run the daytime lighting on a timer for roughly 12 hours, then make the enclosure dark overnight. Replace the lamp on schedule or verify output with an appropriate meter.
Secure or guard fixtures so the tortoise cannot contact hot glass or a breakable lamp. After rearranging climbing routes or hides, re-check distance and shade instead of assuming the old setup still applies.
UVB, heat, calcium, and the rest of the diet work as one husbandry system. More supplement is not a safe substitute for unmeasured lighting, and more UVB is not automatically better.
Discuss supplement choice with a reptile veterinarian, especially for a an unusually light-sensitive individual, a growing juvenile, an egg-producing female, or a tortoise showing weakness or skeletal change.
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