1. What is a Light Fixture Energy Savings Calculator?

Definition: This calculator estimates the cost savings from upgrading to more energy-efficient light fixtures.

Purpose: It helps homeowners and businesses evaluate the financial benefits of lighting upgrades by comparing old and new fixture wattages.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Savings \) — Cost savings in dollars
• \( W_{old} \) — Wattage of old fixture
• \( W_{new} \) — Wattage of new fixture
• \( Hours \) — Annual operating hours
• \( Rate \) — Electricity cost per kilowatt-hour

Explanation: The wattage difference represents power savings, multiplied by operating hours to get energy savings, then by rate for cost savings.

3. Importance of Energy Savings Calculation

Details: Proper calculation helps justify lighting upgrades, forecast ROI, and make informed decisions about energy efficiency investments.

4. Using the Calculator

Tips: Enter wattages for both old and new fixtures, estimated annual operating hours, and your local electricity rate (default $0.12/kWh).

5. Frequently Asked Questions (FAQ)

Q1: What if my new fixture uses more power?
A: The calculator will show negative savings, indicating increased costs from the upgrade.

Q2: How do I find my electricity rate?
A: Check your utility bill or contact your electricity provider for current rates.

Q3: Should I include all lights in one calculation?
A: For multiple identical fixtures, multiply the result by the quantity. For different fixtures, calculate each separately.

Q4: What time period does this represent?
A: The savings are for whatever time period your operating hours represent (e.g., annual savings if using annual hours).

Q5: Does this include maintenance savings?
A: No, this only calculates energy cost savings. LED fixtures typically have additional savings from longer lifespan.