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LED Savings & ROI Calculator

Time to break even

Time to Break Even

3.7 months

Your time to break even comes out to about 3.7 months.

$13.03/yr · 46.5 kg CO₂/yr · 112 day payback

$4.00 bulb ÷ $0.04/day

Annual financial savings

$13.03/yr

$1.09/mo · $0.04/day

Carbon footprint reduction

46.5 kg CO₂/yr

93.1 kWh saved × 0.5 kg/kWh

Daily operating cost

$0.04legacy

LED $0.01/day

Monthly operating cost

$1.28legacy

Save $1.09/mo

Annual CO₂ avoided

46.5kg

3.88 kg/mo · 93.1 kWh saved

Power saved

51 W per bulb

Payback in days

112 days

Beyond the electric bill

  • Longer life: quality LEDs often last 15,000–50,000 hours—years of daily use before replacement.
  • Less heat: fewer watts mean less waste heat, which helps in summer and reduces stress on shades and enclosed fixtures.
  • Fast payback: on heavily used fixtures, energy savings alone often return the bulb price in months—not years.

Why LED is the best investment for your home's energy efficiency

Learn more: electricity and greenhouse gases

Most home lighting emissions are indirect—they come from power plants that supply your grid, not from the bulb itself. Every kWh you avoid by switching to LED multiplies by your region's carbon intensity (kg CO₂ per kWh) to estimate greenhouse gas savings. Cleaner grids mean fewer kg CO₂ per kWh saved; coal-heavy grids mean each watt-hour cut matters even more.

How lighting efficiency impacts global carbon emissionsInternational Energy Agency

Save Report: Download a PDF via JoinMyPDF.

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How this calculator works

How to use the LED Savings & ROI Calculator

The Formula

Daily savings = (legacy W − LED W) × hours ÷ 1,000 × $/kWh. Payback days = LED bulb price ÷ daily savings. Operating cost ignores bulb replacements—use LED vs. Incandescent ROI for lifetime bulb economics.

Practical Example

Q: LED uses more watts? A: No payback on energy—pick a lower-watt LED with matched lumens. Q: Whole home? A: Add one row per fixture or use the retrofit ROI calculator for many bulbs.

About LED Savings & ROI Calculator

Payback math

Daily savings = (legacy W − LED W) × hours ÷ 1,000 × $/kWh. Payback days = LED bulb price ÷ daily savings. Operating cost ignores bulb replacements—use LED vs. Incandescent ROI for lifetime bulb economics.

Frequently asked questions

Q: LED uses more watts? A: No payback on energy—pick a lower-watt LED with matched lumens. Q: Whole home? A: Add one row per fixture or use the retrofit ROI calculator for many bulbs.

Further Reading

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