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LED ROI Calculator
See how much you can save by switching to Go Green LED fixtures. Calculate your energy savings, payback period, and 179D tax deduction eligibility.
Energy Savings Tool
Calculate Your LED Savings
Enter your current lighting setup to see projected annual savings, payback period, maintenance reduction, and carbon impact. Estimates account for ballast losses on your existing fixtures.
How do you calculate the payback on an LED retrofit?
Simple payback in years = net project cost / annual savings. Net cost is fixtures plus installation minus utility rebates. Annual savings are the energy saved, (old watts minus new watts) x fixtures / 1,000 x annual hours x $/kWh, plus the relamping labour and lamps no longer bought. Count the old fixture's ballast: metal halide draws about 15% above lamp wattage, HPS 13%, fluorescent 10%. Example: 75 four-lamp fluorescent troffers (128 W each, about 141 W with ballast) replaced by 40 W LED panels, 10 hours a day, 5 days a week, at $0.13 per kWh, save about 19,700 kWh and $2,600 a year; at a net cost of $6,500 the payback is 2.5 years. The calculator below runs the same arithmetic on your own figures.
Current System
Lighting Calculator
How Many Lumens Do You Need?
Size your space to IES light-level targets, or find the LED that replaces your old fixture.
Estimates based on IES recommended light levels. We confirm the exact layout with a free photometric plan.
Tax Incentive
179D Commercial Building Deduction
The Section 179D Energy Efficient Commercial Building Deduction lets building owners and designers claim $0.59 to $1.19 per square foot at the base rate, scaling with the energy reduction achieved, or up to $5.94 per square foot where prevailing wage and apprenticeship labor standards are met. The 2026 amounts are from IRS Revenue Procedure 2025-32.
Go Green's DLC Premium models (the GGL-AR09 area light, GGL-LHB10 high bay, GGL-WP11F wall pack and the backlit panels among them) run 130 to 170 lumens per watt; each model's listing is on its product page. Combined with utility rebates, the effective cost of your LED retrofit can be significantly reduced.
Example: a 50,000 sq ft warehouse that meets the labor standards could qualify for a $297,000 deduction, or $29,500 to $59,500 at the base rate. Construction must have begun on or before June 30, 2026. Confirm your position with a tax professional.
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