LED Wash Par Can Replacement Equiv Lookup

Compare measured LED/PAR matched-area illuminance with whole fixture counts and actual power; assumes additive matched coverage, not wattage-only equivalence, spectral rendering, dimming or physical fixture compatibility.

Description

Replacement lighting estimates need matched-area illuminance rather than wattage alone.

Replacement lighting estimates need matched-area illuminance rather than wattage alone. Whole fixtures introduce rounding in both output and power.^[1]

Enter positive LED lux and nonnegative reference lux/powers. Return whole count, modeled lux and signed power reduction.

When to use LED Wash Par Can Replacement Equiv Lookup

Use LED Wash Par Can Replacement Equiv Lookup when you need to evaluate the supplied records under the calculation and evidence rules below. Assumes additive matched coverage; no spectral rendition, dimming or physical compatibility is established.

Prepare the actual venue, production, inventory or financial records requested. Confirm units and supply applicable local limits or verified catalog values.

How to use LED Wash Par Can Replacement Equiv Lookup and understand its results

Prepare the actual venue, production, inventory or financial records requested. Confirm units and supply applicable local limits or verified catalog values.
Enter referenceMeasuredLuxOnMatchedArea, observedLedLuxPerFixtureOnSameArea, referenceFixturePowerW, observedLedFixturePowerW using the field table and calculation rules, then run the tool.
Read minimumWholeLedFixturesForMatchedLux, modeledMatchedLuxWithWholeFixtures, signedFixturePowerReductionW. 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
referenceMeasuredLuxOnMatchedArea	Reference measured lux on matched area	number	Required
observedLedLuxPerFixtureOnSameArea	Observed led lux per fixture on same area	number	Required
referenceFixturePowerW	Reference fixture power w	number	Required
observedLedFixturePowerW	Observed led fixture power w	number	Required

Enter positive LED lux and nonnegative reference lux/powers. Return whole count, modeled lux and signed power reduction.

count=ceil(referenceLux/LEDLux); reduction=referencePower−count×LEDPower

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

Output field	Meaning	Value type
minimumWholeLedFixturesForMatchedLux	Minimum whole led fixtures for matched lux	number
modeledMatchedLuxWithWholeFixtures	Modeled matched lux with whole fixtures	number
signedFixturePowerReductionW	Signed fixture power reduction w	number

json

{
  "input": {
    "referenceMeasuredLuxOnMatchedArea": 1000,
    "observedLedLuxPerFixtureOnSameArea": 400,
    "referenceFixturePowerW": 500,
    "observedLedFixturePowerW": 100
  },
  "output": {
    "minimumWholeLedFixturesForMatchedLux": 3,
    "modeledMatchedLuxWithWholeFixtures": 1200,
    "signedFixturePowerReductionW": 200
  }
}

Limitations and assumptions

Assumes additive matched coverage; no spectral rendition, dimming or physical compatibility is established.

Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Practical Prop Lamp Wattage Circuit Load Add Calculator: Single-phase RMS current depends on true power, supply voltage and matched power factor. Installed but inactive lamps remain separate. For a complementary task, use Gel Lee vs Rosco Equivalent Crossref Lookup: Gel alternatives can be screened using measured color distance under the same reference illumination. Similarity is not spectral equivalence.

References

LED Wash Par Can Replacement Equiv Lookup — tool.io

Similar or alternative tools

Practical Prop Lamp Wattage Circuit Load Add Calculator
Single-phase RMS current depends on true power, supply voltage and matched power factor. Installed but inactive lamps remain separate.
Gel Lee vs Rosco Equivalent Crossref Lookup
Gel alternatives can be screened using measured color distance under the same reference illumination. Similarity is not spectral equivalence.