What multi-voltage really means on a spec sheet and when one part number can cover both 12V and 24V fleets.
WEIKANG lamps list 12V, 24V and 10~30V. The first two are fixed-voltage builds. The third is a multi-voltage driver that regulates anything inside the 10 to 30 volt window, which covers a 12V light vehicle system, a 24V truck system and the sag and surge either can see in service.
If you sell one trailer model into markets that use both 12V and 24V tractors, a 10~30V lamp collapses two part numbers into one. It also removes the risk of a 12V lamp being fitted to a 24V vehicle in the field, which is a common warranty cause.
A single-voltage fleet buying in volume has no reason to pay for the wider driver. WEIKANG lists 24V by special order for exactly this case.
A lamp rated for the voltage can still fail if the string draws more than the circuit allows. Count the lamps on the branch and check the total, particularly on long trailers running dozens of 3 LED markers.

450 mm steel-bodied rear lamp for heavy trucks and trailers
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320 mm plastic-bodied four-function rear lamp
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340 mm deep-body combination rear light, 36 diodes
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340 mm combination lamp with bolt-on iron mesh guard
View product →No. Fit lamps matched to the vehicle system, or use the 10~30V multi-voltage version throughout.
The multi-voltage operating range is listed across the truck and trailer lamp range.
Send the panel aperture, voltage and function. We will shortlist models and quote your quantity.