How do you calculate UV LED retrofit payback?

Subtract annual LED maintenance from your annual mercury savings to get net annual savings, then divide the installed retrofit cost by that figure. Here 32,000 minus 2,200 gives 29,800 per year, and 85,000 / 29,800 is about 2.85 years.

Is a UV LED retrofit worth it?

For most high-duty curing lines, yes. Mercury lamps consume power continuously through shutters and warm-up, while LED is instant-on and draws power only when curing. A sub-three-year payback like the 2.85 years here is typically a strong capital case.

What is included in annual mercury savings?

Avoided electricity, replacement bulbs, shutter and reflector maintenance, ozone-exhaust and cooling load, scrap from lamp-aging output drift, and downtime for bulb changes. Add only the costs that actually disappear after the retrofit.

Why subtract LED maintenance from the savings?

LED systems still need periodic optics cleaning, occasional module replacement and cooling-loop upkeep. Netting that 2,200 per year against gross savings keeps the payback honest rather than overstated.

What is a good payback period for a curing upgrade?

Many manufacturers approve retrofits under three years and scrutinize anything over five. At 2.85 years this project clears most hurdle rates, and the five-year net cash position of 64,000 shows the surplus after the system has paid for itself.

Does payback capture all the benefits of UV LED?

No. It misses throughput from instant-on, lower reject rates from stable output, reduced heat on thin substrates, and the elimination of mercury-disposal compliance. Those strengthen the case beyond the headline number.

UV Curing calculator

UV LED Payback Calculator

A UV LED retrofit payback tells you how fast switching from mercury-arc lamps to UV LED arrays pays for itself through energy, lamp-replacement and downtime savings. Process engineers, plant managers and capital committees use it to rank curing-line upgrades against other projects competing for the same budget. UV LED draws far less power, eliminates warm-up and shutter losses, runs cooler and lasts tens of thousands of hours versus a mercury bulb's roughly 1,000 to 2,000 hours. The payback figure turns those operating-cost differences into a single number a CFO will recognize.

What this calculator does

Compare a UV LED retrofit's installed cost against the annual mercury energy + lamp + scrap savings to see years to payback.
Use it to build a capital-request payback case for a mercury-to-LED retrofit, or to test whether vendor-quoted savings hold up against your real lamp and energy numbers.
It computes the simple payback period in years for a UV LED retrofit, plus net annual savings and the five-year net cash position.

Formula used

Net annual savings = annual mercury savings − annual LED maintenance
Payback (yr) = retrofit installed cost ÷ net annual savings
Five-year net = net annual savings × 5 − retrofit installed cost

Inputs explained

Retrofit installed cost: LED head + driver + controls + install labor + qualification - not just the LED hardware quote.
Annual mercury savings: Sum of energy savings, lamp purchase savings, and scrap savings vs the current mercury baseline.
Annual LED maintenance: Driver replacement reserve, optical cleaning, periodic radiometer / re-validation cost.

How to use the result

Use it during capital justification when you have a vendor install quote and a credible estimate of the mercury-lamp operating costs the LED system will displace.
It is a simple, undiscounted payback; it ignores the time value of money, ink or coating reformulation costs, and any throughput gains from instant-on operation, so treat it as a screening number.

Common questions

How do you calculate UV LED retrofit payback? Subtract annual LED maintenance from your annual mercury savings to get net annual savings, then divide the installed retrofit cost by that figure. Here 32,000 minus 2,200 gives 29,800 per year, and 85,000 / 29,800 is about 2.85 years.
Is a UV LED retrofit worth it? For most high-duty curing lines, yes. Mercury lamps consume power continuously through shutters and warm-up, while LED is instant-on and draws power only when curing. A sub-three-year payback like the 2.85 years here is typically a strong capital case.
What is included in annual mercury savings? Avoided electricity, replacement bulbs, shutter and reflector maintenance, ozone-exhaust and cooling load, scrap from lamp-aging output drift, and downtime for bulb changes. Add only the costs that actually disappear after the retrofit.
Why subtract LED maintenance from the savings? LED systems still need periodic optics cleaning, occasional module replacement and cooling-loop upkeep. Netting that 2,200 per year against gross savings keeps the payback honest rather than overstated.
What is a good payback period for a curing upgrade? Many manufacturers approve retrofits under three years and scrutinize anything over five. At 2.85 years this project clears most hurdle rates, and the five-year net cash position of 64,000 shows the surplus after the system has paid for itself.

Last reviewed 2026-05-12.