How to Calculate LED Lighting Savings

What is LED Lighting Savings?

LED bulbs use 75–90% less energy than incandescent bulbs and last 15–25× longer. This calculator quantifies the annual financial savings from switching.

Formula

Annual savings = (Old wattage − LED wattage) × Hours per year × Price per kWh / 1,000

Step-by-Step Guide

1Annual saving = (Old W − LED W) / 1000 × Hours/day × 365 × Rate × Bulbs
260W incandescent → 9W LED (85% energy saving)
3LED lifespan: 15,000–25,000 hours vs 1,000 (incandescent)
4Payback period usually under 1 year at typical electricity prices

Worked Examples

Input

12 bulbs: 60W→9W, 5h/day, $0.30/kWh

Result

Annual saving = 12×51W×5×365×$0.30/1000 = $335

Frequently Asked Questions

What is Led Savings?

LED bulbs use 75–90% less energy than incandescent bulbs and last 15–25× longer. This calculator quantifies the annual financial savings from switching

How accurate is the Led Savings calculator?

The calculator uses the standard published formula for led savings. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Led Savings calculator use?

This calculator works with pounds, inches, percentages, watts. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Led Savings calculator use?

The core formula is: Annual saving = (Old W − LED W) / 1000 × Hours/day × 365 × Rate × Bulbs. Each step in the calculation is shown so you can verify the result manually.

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