How Often To Replace UVB Bulb
Track an exact lamp-label date while letting faults, UV meter readings and enclosure changes override the calendar. Inputs stay in your browser.
The calendar follows the exact selected manufacturer label or a custom interval. A physical fault, low measured UV or enclosure-layout change overrides a date-only reminder.
Context matters.
- Do not use one lamp model's lifespan, distance chart or UV percentage for a different product; choose custom when the exact preset does not match.
- Mesh, reflectors, fixture type, distance and lamp orientation change the UV delivered at the animal's basking site.
- Use a reptile veterinarian or current species care plan for the target UV Index, and follow electrical-safety and mercury-lamp disposal instructions.
Sources & scope
The calculation guide and this source trail show what the result means, where the rule came from and when it was last reviewed. This is source-and-calculation QA, not a claim of medical, legal, tax or other professional review; time-sensitive decisions still belong with the linked authority.
A visible path from input to answer.
Track an exact lamp-label date while letting faults, UV meter readings and enclosure changes override the calendar. The page keeps the calculation scope and its limits beside the result so the output can be checked, copied or revisited.
- Read the record. The calculator uses Lamp first used, Check date, Exact lamp label, Product-label replacement interval (months) and Typical operating hours per day and 5 additional fields supplied in the form.
- Apply the scope. It applies the Product-specific reptile lighting — selected manufacturer label or custom label interval reference and the explicit date, unit and counting conventions shown in the result.
- Expose the checkpoints. Intermediate rows, warnings and timeline events stay visible; the emphasized row identifies the primary checkpoint when one exists.
The calendar follows the exact selected manufacturer label or a custom interval. A physical fault, low measured UV or enclosure-layout change overrides a date-only reminder.
- Label replacement dateOct 30, 2026
Calculation purpose: Track an exact lamp-label date while letting faults, UV meter readings and enclosure changes override the calendar. This is a general planning reference; local conditions, product instructions or personal records can override the estimate.
Calendar inputs use plain year-month-day semantics. Leap days, month ends, date-pair order and unsupported dates are checked before the result is shown.
Rule set 2.0.0 · Last reviewed 2026-08-20 · Next review due 2027-02-20. The source panel below contains the linked evidence.
What to know before using the result.
Can I choose a 12-month preset for any UVB lamp?
No. The presets apply only to the exact named product lines. Choose custom and copy the current product-label interval for any other lamp.
Why can a UV meter override the date?
The animal receives UV at the basking site, not at the bulb. A below-target reading can reflect lamp output, distance, mesh, fixture or orientation and needs investigation now.
Does visible brightness show that UVB is still adequate?
No. A lamp can still look bright while UV output has changed; use the product label and, when appropriate, a suitable meter and species care plan.