| Diagram | Fig. 32 — T100C IGNITION CAPACITOR AND HEADLAMP · ref 14 |
| Subsystem | electrical |
| Listed in parts books | 1970 |
Bulb (40/27 W vertical dip, Pre focus 99-1 042)
Pre-focus headlamp bulb, 40/27 W vertical dip, Lucas 99-1042, as fitted in the T100C and TR6C headlamp assembly.
This is a headlamp bulb, listed in the catalog as a 40/27 W vertical dip, pre-focus type, cross-referenced to Lucas 99-1042. It shows up in the parts-book figures covering the ignition capacitor and headlamp assembly on the T100C and TR6C.
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The pre-focus base means the bulb seats in the reflector at a fixed position so the beam pattern stays correct without adjustment at the bulb itself. Beyond that and the wattage figures given, our record doesn't spell out voltage, base fitting dimensions, or which other models it might cross into.
If you're replacing one, check what's currently in your headlamp shell against the 99-1042 reference before ordering, since we don't have more detail on this one beyond what's in the parts book.
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