LED Savings Calculator

• •Use the LED Savings Calculator when you need accurate results quickly without the risk of manual computation errors or unit conversion mistakes.
• •Use it to verify calculations made by hand or in spreadsheets — an independent check can catch errors before they lead to costly decisions.
• •Use it to explore how changing input parameters affects the output — a quick way to develop intuition and identify the most influential variables.
• •Use it when collaborating with others to ensure everyone is working from the same numbers and applying the same assumptions.

Switching from incandescent or CFL bulbs to LED lighting is one of the simplest and most cost-effective energy upgrades you can make. The LED Savings Calculator shows you exactly how much money and energy you will save by making the switch. A typical household with 20 light fixtures that replaces 60-watt incandescent bulbs with 9-watt LED equivalents can save over $100 per year on electricity. LED bulbs also last 15,000-25,000 hours compared to 1,000-1,200 hours for incandescents, dramatically reducing replacement costs. This calculator compares the annual energy consumption of your current bulbs against LED equivalents.

• !Comparing bulbs by wattage instead of lumens; wattage is power consumed, lumens is light output.
• !Not accounting for LED bulb purchase cost; though LEDs pay for themselves within months.
• !Assuming all LEDs are equal quality; cheap LEDs may flicker, produce poor color, or fail early.