{
  "provider": {
    "name": "CalculateEnergySavings.com",
    "source_url": "https://calculateenergysavings.com/",
    "terms_url": "https://calculateenergysavings.com/api-terms/",
    "terms_version": "2026-08-25"
  },
  "id": "lighting-retrofit",
  "name": "Lighting Retrofit Savings Calculator",
  "description": "Compare existing and proposed lighting power, operating hours, electricity cost, maintenance savings, project cost, payback, NPV, and IRR.",
  "status": "published",
  "callable": true,
  "version": "1.0.0",
  "url": "https://calculateenergysavings.com/calculators/lighting-retrofit/",
  "methodology_url": "https://calculateenergysavings.com/calculators/lighting-retrofit/#methodology",
  "api_url": "https://calculateenergysavings.com/api/v1/calculators/lighting-retrofit",
  "calculate_url": "https://calculateenergysavings.com/api/v1/calculators/lighting-retrofit/calculate",
  "input_schema": {
    "type": "object",
    "additionalProperties": false,
    "properties": {
      "fixtureCount": {
        "type": "number",
        "default": 100
      },
      "existingFixtureWatts": {
        "type": "number",
        "default": 64
      },
      "proposedFixtureWatts": {
        "type": "number",
        "default": 30
      },
      "operatingHours": {
        "type": "number",
        "default": 3200
      },
      "controlsSavingsPercent": {
        "type": "number",
        "default": 0
      },
      "electricityRate": {
        "type": "number",
        "default": 0.12
      },
      "demandCharge": {
        "type": "number",
        "default": 0
      },
      "demandMonths": {
        "type": "number",
        "default": 12
      },
      "annualMaintenanceSavings": {
        "type": "number",
        "default": 500
      },
      "installedCost": {
        "type": "number"
      },
      "incentiveAmount": {
        "type": "number",
        "default": 0
      },
      "projectLife": {
        "type": "number",
        "default": 12
      },
      "discountRatePercent": {
        "type": "number",
        "default": 7
      },
      "energyEscalationPercent": {
        "type": "number",
        "default": 2.5
      }
    }
  },
  "example_inputs": {
    "fixtureCount": 100,
    "existingFixtureWatts": 64,
    "proposedFixtureWatts": 30,
    "operatingHours": 3200,
    "controlsSavingsPercent": 0,
    "electricityRate": 0.12,
    "demandCharge": 0,
    "demandMonths": 12,
    "annualMaintenanceSavings": 500,
    "installedCost": "",
    "incentiveAmount": 0,
    "projectLife": 12,
    "discountRatePercent": 7,
    "energyEscalationPercent": 2.5
  },
  "source_url": null,
  "formulas": [],
  "disclaimer": "Screening estimate only. Verify measurements, assumptions, tariffs, equipment constraints, and applicable requirements before making a project or purchasing decision."
}