Lucas PFB (BPF) headlight

I recently saw an ad for Lucas PFB headlight bulbs. Are these something new or the same as 50 years ago? If new, what is special about them?

Thanks,
Ed

Do you mean BPF (British Pre-Focus)?

If so then it's for an original headlamp and not something new unless it's a 'Halogen' or another modern type of replacement bulb.

L.A.B. said:

Do you mean BPF (British Pre-Focus)?

If so then it's for an original headlamp and not something new unless it's a 'Halogen' or another modern type of replacement bulb.

LED Headlight bulbs British Pre-Focus + H4s

Double Dipper, British Pre Focus LEDs, Stop tail LEDs, LED H4 car headlights, LED headlight bulbs,LED H4, H4 LED,British Pre Focus LED,Bayonet Cap LED, LED headlamp bulbs,H4 LED headlamp bulbs,LED headlights for old bikes,LED headlights for old cars

www.norbsa02.freeuk.com

Click to expand...

LAB,
What does Pre-Focus mean?Is it something they do to the bulb?
Thanks,Mike

I think it goes back to the old days, when electric lighting was new and there was a need to adjust the position of the bulb in the reflector to achieve the best beam focus.
BPF was a progression from this, in that the position of the bulb in the reflector is fixed and, therefore, 'pre-focused.' It may also refer to the fact that the lens is moulded in a particular way to focus the beam.
Something of that sort, anyway
Others may know better........

YING said:

LAB,
What does Pre-Focus mean?Is it something they do to the bulb?

Click to expand...

L.A.B. said:

Click to expand...

Thanks Les
Mike