Textile Display Rest Period Rotator Planner

Budget dark calendar rest to meet caller long-run average dose with fixed display run; darkness reduces future exposure rate, not reversal or biological recovery of textile damage.

Description

Dark periods reduce future average exposure but do not reverse textile fading.

Dark periods reduce future average exposure but do not reverse textile fading. A display-rest cycle can be budgeted against a long-run dose policy.^[1]

Budget dark calendar rest to meet caller long-run average dose with fixed display run; darkness reduces future exposure rate, not reversal or biological recovery of textile damage.

When to use Textile Display Rest Period Rotator Planner

Use this tool to budget dark calendar rest to meet caller long-run average dose with fixed display run; darkness reduces future exposure rate, not reversal or biological recovery of textile damage.

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

How to use Textile Display Rest Period Rotator Planner 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 displayLux, displayHoursPerDay, callerDisplayRunDays, callerLongRunLuxHoursPerCalendarDayBudget using the field table and calculation rules, then run the tool.
Read displayRunLuxHours, minimumWholeRestDaysUnderAverageBudget. 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
displayLux	Display lux	number	Required
displayHoursPerDay	Display hours per day	number	Required
callerDisplayRunDays	Caller display run days	integer	Required
callerLongRunLuxHoursPerCalendarDayBudget	Caller long run lux hours per calendar day budget	number	Required

Use positive lux, daily hours at most 24 and positive calendar-day budget, with nonnegative integer display days. Calculate run dose and minimum whole dark days.^[2]

rest days = ceil(max(0,display dose/daily calendar budget − display days))

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

Output field	Meaning	Value type
displayRunLuxHours	Display run lux hours	number
minimumWholeRestDaysUnderAverageBudget	Minimum whole rest days under average budget	number

json

{
  "input": {
    "displayLux": 50,
    "displayHoursPerDay": 10,
    "callerDisplayRunDays": 10,
    "callerLongRunLuxHoursPerCalendarDayBudget": 100
  },
  "output": {
    "displayRunLuxHours": 5000,
    "minimumWholeRestDaysUnderAverageBudget": 40
  }
}

Limitations and assumptions

The policy is supplied; darkness does not repair prior damage.

Numbers and computed results must be finite; overflow produces an error. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

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. For a complementary task, use Light Rotation Schedule Interval Planner for Works on Paper: Fit whole caller rotation blocks independently across works with different remaining light ledgers/illuminance; no recovery of prior fading during dark rotation.

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

References

Agents of deterioration: light, ultraviolet and infrared — Canadian Conservation Institute
Textile Display Rest Period Rotator Planner — tool.io

Similar or alternative tools

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.
Light Rotation Schedule Interval Planner for Works on Paper
Fit whole caller rotation blocks independently across works with different remaining light ledgers/illuminance; no recovery of prior fading during dark rotation.