FREE LIGHTING TOOL
LED Lighting ROI Calculator
Compare electricity costs and purchase-cost payback for an LED upgrade. Use measured fixture watts and your current electricity tariff for a useful estimate.
Compare electricity costs and purchase-cost payback for an LED upgrade. Use measured fixture watts and your current electricity tariff for a useful estimate.
Adjust the inputs below. Results update in real time. No sign-up required.
Enter your current fixtures and LED replacement details.
Use the energy rate from your electricity bill.
Operating hours per day (e.g. offices 10, warehouses 16, retail 12).
Total number of fixtures to replace.
Watts per existing fixture (e.g. halogen, CFL, metal halide).
Watts per LED fixture delivering equivalent brightness.
Purchase price per LED fixture (installation excluded).
Prefer a website form? Contact Tonghua Lighting
Send your fixture list, quantities, and project location for a quote.
Browse the range on Tonghua Lighting, our main manufacturer website.
Annual electricity savings come from the difference in fixture watts, multiplied by fixture count, operating hours and electricity price. Payback here covers the LED purchase price only.
Fifty fixtures changing from 60 W to 20 W, used for 12 hours/day at $0.15/kWh, save 8,760 kWh and $1,314/year. At $15 per new fixture, the $750 purchase cost pays back in about 6.8 months.
Background on fixture efficacy, light quality and lifetime. The planning assumptions shown here are specific to this tool.
Annual electricity savings = (current watts − LED watts) × fixture count × hours/day × 365 ÷ 1,000 × price/kWh. This tool’s payback in months is LED purchase cost ÷ annual savings × 12. Installation, maintenance, incentives and financing are excluded.
There is no single good payback period. Compare the estimate with your investment criteria and include installation costs, maintenance, and confirmed incentives.
The tool multiplies saved kWh by 0.707 kg CO2/kWh as an illustrative factor. Use your location’s reporting factor for a formal carbon calculation.
Yes. This calculator works for both residential and commercial LED retrofits. Enter your fixture quantity, wattages, operating hours, electricity rate, and LED unit price to get savings, payback period, and CO2 reduction instantly. For large commercial projects, request a custom quote and our engineers can provide a detailed photometric layout and DIALux report.
Send the current and proposed fixture wattage, quantity, operating hours, and destination. Ask for model pricing to refine your payback estimate.