UV Curing worked example

UV Intensity Decay vs New at 86% lamp replacement threshold: a worked example

This scenario runs the uv intensity decay vs new calculation on the strong side: 86% lamp replacement threshold, with every other input held at its documented default. Use it after every radiometer pass to trend lamp aging objectively and decide whether to swap, slow the line, or keep going.

The inputs for this scenario

  • Today's irradiance reading: 1,380 mW / cm² (unchanged)
  • New-lamp baseline irradiance: 2,000 mW / cm² (unchanged)
  • Lamp replacement threshold: 86 % of new (raised for this scenario; the documented default is 75)

Working through the calculation

  • Applying the documented formula (% of new = today's reading ÷ original baseline × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 69 % of new for % of new (today), the number this scenario is built around.
  • At this operating point the engine returns 17 points for headroom over replacement threshold.
  • At this operating point the engine returns 1,380 mW / cm² for today's reading.
  • At this operating point the engine returns 2,000 mW / cm² for original baseline.

How this compares with the baseline

  • Against the tool's baseline example, where lamp replacement threshold sits at 75% and the headline result is 69 % of new, this scenario lands almost exactly on the baseline at 69 % of new.
  • Use it each time you log a periodic radiometer reading, or when deciding whether an aging lamp can survive the next production run. 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

  • % of new (today): 69 % of new (headline result)
  • Headroom over replacement threshold: 17 points
  • Today's reading: 1,380 mW / cm²
  • Original baseline: 2,000 mW / cm²

Run it with your numbers

  • Every input above is editable in the live UV Intensity Decay vs New calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.