Lightbulb Comparison Calculator
Lightbulb Comparison
Compare the total cost of LED, CFL, and incandescent bulbs including purchase price and energy usage
cents/kWh
Formula
Total Cost = (Replacements x Bulb Price x Count) + (Watts/1000 x Hours x Years x Count x Rate)
Frequently Asked Questions
Are LED bulbs worth the higher price?
Yes, LED bulbs use 85% less energy than incandescent bulbs and last 25 times longer. The energy savings pay for the higher upfront cost within a few months.
How much can I save by switching to LED?
Switching 20 bulbs from incandescent to LED saves approximately $100-$200 per year in electricity costs depending on usage and local rates.