| Also known as | WW13011L |
| Diagram | Fig. 25 — ELECTRICAL EQUIPMENT · ref 8 |
| Subsystem | electrical |
| Listed in parts books | 1960–1965 |
BULB,HEAD LAMP 6V 30/24W
6-volt, 30/24 watt Lucas headlamp bulb (BPF base), part 312, now supplied as 312L.
This is the 6-volt headlamp bulb, Lucas part 312, rated 30/24W. It's the dual-filament bulb that goes in the headlamp shell to give you high and low beam on a 6V electrical system. Lucas made this bulb for a broad range of British bikes of the era, not just Triumphs, so if you're running a 6V system you're likely in the market for this exact number regardless of make.
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The part has since carried forward under the number 312L, which is the current factory designation for the same bulb. If your old parts book lists 312 or you've seen it written as WW13011L, they all point to the same bulb.
We don't have much more detail on file for this one beyond the basic spec. If you're not sure whether your bike runs 6V or has been converted to 12V, check before you order — a 6V bulb in a 12V system won't last.
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