// multi-utility computation suite · offline · instant · precise
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env.led-vs-incandescent Calculator
Compares annual electricity cost and CO₂ emissions between LED and incandescent bulbs at a given usage pattern, and calculates the payback period for switching. A single LED replacing a 60W incandescent typically saves $7–10/year — negligible per bulb, but substantial across a home.
Inputs
Watts Led
Age in completed years. Many health and fitness formulas adjust for age.
Watts Inc
Age in completed years. Many health and fitness formulas adjust for age.
Hours Day
Reference formula or conversion factor shown for context.
Electricity Rate
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
Results
annual savings
Total money or resources saved compared to the baseline or alternative scenario.
LED annual electricity
The result expressed on a per-year basis.
Incandescent annual
The result expressed on a per-year basis.
energy saved (kWh/yr)
The total amount saved compared to the baseline scenario — cost savings, time savings, or resource savings.
payback on $10 LED
Sample size or count used in the calculation.
CO2 avoided (kg/yr)
Reference formula or conversion factor shown for context.