UV Curing worked example

UV Lamp Life Remaining with rated lamp life remaining of 4,500 hr: a worked example

This scenario runs the uv lamp life remaining calculation on the strong side: rated lamp life remaining of 4,500 hr, with every other input held at its documented default. Use it to schedule lamp replacements proactively (before they cause undercure) instead of reactively (after a quality escape).

The inputs for this scenario

  • Rated lamp life remaining: 4,500 hr (raised for this scenario; the documented default is 1,800)
  • Average daily lamp runtime: 10 hr / day (unchanged)
  • Replacement safety factor: 1.2 x (unchanged)

Working through the calculation

  • Applying the documented formula (Days remaining (raw) = useful life remaining รท average daily runtime) to the inputs above produces each figure below.
  • At this operating point the engine returns 375 days until replacement for days until planned swap, the number this scenario is built around.
  • At this operating point the engine returns 450 days for days until rated end-of-life.
  • At this operating point the engine returns 4,500 hr for useful life remaining.
  • At this operating point the engine returns 10 hr / day for average daily runtime.

How this compares with the baseline

  • Against the tool's baseline example, where rated lamp life remaining sits at 1,800 hr and the headline result is 150 days until replacement, this scenario comes in 150% above the baseline at 375 days until replacement.
  • Use it to schedule lamp changes, order spares before lead time runs out, and align swaps with planned downtime instead of reacting to undercure. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Days until planned swap: 375 days until replacement (headline result)
  • Days until rated end-of-life: 450 days
  • Useful life remaining: 4,500 hr
  • Average daily runtime: 10 hr / day

Run it with your numbers

  • Every input above is editable in the live UV Lamp Life Remaining calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.