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.

Description

UV energy exposure combines content per lumen, illuminance and time.

UV energy exposure combines content per lumen, illuminance and time. Visible lux-hours alone is not a UV-energy dose.^[1]

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.

When to use Annual UV Dose Exposure Accumulator Calculator

Use this tool to 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.

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

How to use Annual UV Dose Exposure Accumulator Calculator 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 observedLux, uvContentMicrowattsPerLumen, exposureHours, uvTransmissionFractions using the field table and calculation rules, then run the tool.
Read uvEnergyJoulesPerM2, unfilteredUvEnergyJoulesPerM2. 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
observedLux	Observed lux	list of number	Required
uvContentMicrowattsPerLumen	Uv content microwatts per lumen	list of number	Required
exposureHours	Exposure hours	list of number	Required
uvTransmissionFractions	Uv transmission fractions	list of number	Required

Align nonnegative lux, content and hours with transmission fractions in [0,1]. Return filtered and unfiltered total energy, using 0.0036 J per µW-hour.^[2]

Paired lists must be nonempty and have equal lengths.

J/m² = Σ 0.0036 × lux × µW/lm × hours × UV transmission

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

Output field	Meaning	Value type
uvEnergyJoulesPerM2	Uv energy joules per m2	number
unfilteredUvEnergyJoulesPerM2	Unfiltered uv energy joules per m2	number

json

{
  "input": {
    "observedLux": [
      100,
      50
    ],
    "uvContentMicrowattsPerLumen": [
      10,
      20
    ],
    "exposureHours": [
      2,
      3
    ],
    "uvTransmissionFractions": [
      1,
      0.5
    ]
  },
  "output": {
    "uvEnergyJoulesPerM2": 12.599999999999998,
    "unfilteredUvEnergyJoulesPerM2": 18
  }
}

Limitations and assumptions

Measured spectra and exposure are supplied; no fading prediction is made.

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 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. For a complementary task, use Light-Sensitive Object Annual Lux-Hours Budget Calculator: Account measured object light exposure and prior annual ledger against caller budget, retaining signed overspend; dose is not a material-safe limit.

Further background: Agents of deterioration: light, ultraviolet and infrared.

References

Agents of deterioration: light, ultraviolet and infrared — Canadian Conservation Institute
Annual UV Dose Exposure Accumulator Calculator — tool.io

Similar or alternative tools

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.
Light-Sensitive Object Annual Lux-Hours Budget Calculator
Account measured object light exposure and prior annual ledger against caller budget, retaining signed overspend; dose is not a material-safe limit.