LED Conversion Calculator — Energy Savings & Cost Estimates

LED Conversion Calculator

Calculate energy savings, cost reductions, and environmental benefits when converting from traditional lighting to LED. Compare different bulb types and estimate payback periods.

Step 1: Current Lighting Setup

Watts
Hours

About Traditional Lighting

Incandescent bulbs are only 5-10% efficient, losing 90% of energy as heat. Halogens are slightly better at 15-20% efficiency. CFLs are about 25-35% efficient.

Step 2: LED Replacement Options

Watts
Hours

About LED Lighting

LEDs are 80-90% efficient, converting most energy to light. They last 15-25 times longer than incandescent bulbs and use 75-80% less energy for the same light output.

LED Conversion Calculation Results

Summary
Bulb Comparison
Cost Breakdown

Annual Savings After Conversion

$153.90
Payback Period: 3.2 months
Energy Savings
85%
Annual kWh Saved
1026 kWh
CO₂ Reduction
0.72 tons
LED Lifespan
13.7 years

Lighting Technology Comparison

Incandescent
60W
Efficiency: 10%
Lifespan: 1,200h
Annual Cost: $16.43
CFL
14W
Efficiency: 30%
Lifespan: 8,000h
Annual Cost: $3.83
LED
9W
Efficiency: 85%
Lifespan: 25,000h
Annual Cost: $2.46

Comparison Details

LED bulbs provide the same light output (lumens) while using significantly less energy. A 9W LED produces about 800 lumens, equivalent to a 60W incandescent or 14W CFL bulb.

Cost & Energy Breakdown

Savings Calculation Formula

Annual Savings = (Current Wattage – LED Wattage) × Hours × Days × Rate × Bulbs

Calculate energy savings by comparing wattage differences, then multiply by usage hours, days per year, electricity rate, and number of bulbs. Include bulb replacement costs for accurate savings.

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