UV Content Microwatts per Lumen Checker

Audit measured UV irradiance divided by matched illuminance under caller content limit; zero illuminance leaves the ratio undefined, not a safe material classification.

Description

UV content per lumen normalizes UV irradiance by illuminance.

UV content per lumen normalizes UV irradiance by illuminance. Zero illuminance leaves the ratio undefined.

Audit measured UV irradiance divided by matched illuminance under caller content limit; zero illuminance leaves the ratio undefined, not a safe material classification.

When to use UV Content Microwatts per Lumen Checker

Use this tool to audit measured UV irradiance divided by matched illuminance under caller content limit; zero illuminance leaves the ratio undefined, not a safe material classification.

Prepare the collection, exposure, scheduling or financial records required for this calculation. Keep row order and the declared units consistent.

How to use UV Content Microwatts per Lumen Checker and understand its results

Prepare the collection, exposure, scheduling or financial records required for this calculation. Keep row order and the declared units consistent.
Enter uvIrradianceMicrowattsPerM2, matchedIlluminanceLux, callerUvContentLimitMicrowattsPerLumen using the field table and calculation rules, then run the tool.
Read uvContentMicrowattsPerLumen, aboveCallerUvContentFlags. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
uvIrradianceMicrowattsPerM2	Uv irradiance microwatts per m2	list of number	Required
matchedIlluminanceLux	Matched illuminance lux	list of number	Required
callerUvContentLimitMicrowattsPerLumen	Caller uv content limit microwatts per lumen	number	Required

Align nonnegative irradiance with positive lux and a nonnegative caller content limit. Return ratios and flags strictly above the limit; equality does not flag.^[1]

Paired lists must be nonempty and have equal lengths.

UV content µW/lm = UV irradiance µW/m²/illuminance lux

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
uvContentMicrowattsPerLumen	Uv content microwatts per lumen	list of number
aboveCallerUvContentFlags	Above caller uv content flags	list of number

json

{
  "input": {
    "uvIrradianceMicrowattsPerM2": [
      1000,
      0
    ],
    "matchedIlluminanceLux": [
      100,
      50
    ],
    "callerUvContentLimitMicrowattsPerLumen": 5
  },
  "output": {
    "uvContentMicrowattsPerLumen": [
      10,
      0
    ],
    "aboveCallerUvContentFlags": [
      1,
      0
    ]
  }
}

Limitations and assumptions

Matched measurements are required; a ratio does not establish material safety.

Numbers and computed results must be finite; overflow produces an error. Numeric lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use UV Filter Film Percentage Requirement Calculator: Resolve required UV filtering while separately accounting visible attenuation, since UV per lumen changes with both; supplied spectra/content are measured assumptions, not film performance certification. For a complementary task, use Annual UV Dose Exposure Accumulator Calculator: Accumulate matched UV content×lux×hours with separate filter transmissions; conversion is 0.0036 J/m² per µW/m²-hour, not lux-hours alone or predicted fading.

References

UV Content Microwatts per Lumen Checker — tool.io

Similar or alternative tools

UV Filter Film Percentage Requirement Calculator
Resolve required UV filtering while separately accounting visible attenuation, since UV per lumen changes with both; supplied spectra/content are measured assumptions, not film performance certification.
Annual UV Dose Exposure Accumulator Calculator
Accumulate matched UV content×lux×hours with separate filter transmissions; conversion is 0.0036 J/m² per µW/m²-hour, not lux-hours alone or predicted fading.