A conveyor lamp that runs all shift but only has parts beneath it part of the time is spending energy on an empty belt. The gap between lamp-on hours and lamp-working hours, more than nameplate wattage, decides what an LED UV curing conveyor saves.
Q: Does an LED UV curing conveyor use less energy than an arc-lamp conveyor?
A: Usually, but the savings come from how the head is run, not only from what it draws
A UV curing conveyor spends energy in four places: the lamp itself, idle running while no parts are present, the cooling and exhaust needed to carry heat away, and the replacement lamps consumed over its life. LED and mercury-arc heads differ in all four. The largest difference on many lines is the second item — whether the lamp can be switched off between parts or batches without disrupting production.
Spend Point 1: The Lamp Rating
On the Incure CDM™ platform, the arc heads are specified by lamp class: the F100 uses 400 W lamp heads and the F200 uses 600 W lamp heads. An x2A configuration mounts two heads in series, so an F200x2A carries two 600 W heads — 1,200 W of lamp rating — to deliver its 4,500 mJ/cm² UVA at 6 ft/min. That doubled rating buys exactly double the dose of the single-assembly F200x2AC (2,250 mJ/cm²) at the same speed.
The arithmetic is worth doing for each candidate head: if the formulation only needs the lower dose with margin, the second head is energy spent on headroom rather than on cure.
Spend Point 2: Idle Running
Mercury-arc lamps have a warm-up and cooldown cycle, which on a start-stop schedule tends to dictate how the line is paced — operators leave the lamp running through short gaps rather than wait for it to restabilize. The LED heads on the same chassis have no warm-up delay, so output is available the moment the head is switched on.
LED heads also accept PLC, RS-232, and foot-switch inputs with a switchable timer or continuous mode. That enables a lamp that turns on when a part-present sensor sees a part and off when the belt is empty. The arc heads on the CDM™ have no external control port, so they cannot be interlocked this way; belt speed is their only process control.
Email Us with your shift pattern and part spacing and Incure can help estimate how much of your lamp time is spent over an empty belt.
Spend Point 3: Cooling, Exhaust, and Heat Into the Part
Every arc configuration on the CDM™ relies on forced-air cooling and exhaust ventilation to manage lamp heat, and a two-head x2A configuration adds a second head’s thermal load to the facility’s ventilation. Broadband arc output also extends from UVA through UVB into visible light up to 420 nm, so some of the radiant energy reaching the part is outside the band a given photoinitiator uses.
LED heads emit at one factory-configured wavelength — 365, 385, 395, or 405 nm — which concentrates output where a matched adhesive absorbs it. Heat-sensitive plastics and films benefit from that, and so does the room’s air handling. These are qualitative differences; measure part temperature on your own parts rather than assuming a figure.
Spend Point 4: Replacement Lamps Over Time
Arc heads on the CDM™ are rated beyond 1,000 hours with up to 45% intensity decay; LED heads are rated beyond 20,000 hours with 20% or less decay. On paper, that is a twentyfold difference in rated hours. Each replacement event also costs running time on the conveyor itself, and on an x2A configuration both heads should be replaced on the same cycle to keep the two exposure zones matched.
A Simple Lamp-Hour Audit
Before comparing technologies, measure how the current line actually runs. Consider a hypothetical single-shift line where the lamp is on for 8 hours but parts are under it for 5 of those hours. Utilization is 5 ÷ 8 = 62.5%, meaning 3 hours a day of lamp output, cooling, and lamp life go to an empty belt. Over a hypothetical 250-day year, that is 750 idle lamp-hours — three-quarters of an arc head’s 1,000-hour rating spent on nothing.
An interlocked LED head on the same schedule would accumulate lamp hours close to the 5 working hours instead. Run the same calculation with your own shift data; the result shows whether the savings case is driven by idle time, by lamp replacement, or by neither.
When an Arc Head Is Still the Right Spend
Energy is not the only deciding variable. A formulation qualified on broadband arc exposure — especially one that requires UVC from an x2AC assembly — should stay on an arc head unless it is requalified. The Incure F-Series™ flood lamp guide covers the arc chemistry behind those heads, the Incure CDM™ UV conveyor guide lists every configuration, and the broader overview of conveyor technologies is in the curing conveyor industrial guide.
Contact Our Team to review lamp utilization and head selection for your line.
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