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7” BPF LIGHT UNITS
For the new post war models, Lucas designed a flush fitting headlamp and set about persuading car
makers to use it. The first car to do so was the ‘raised headlamp’ Morris Minor in 1949/50. As it was
about 7 inches in diameter it became known as the “7 inch Headlamp”. It consisted of a lens/reflector
unit with a replaceable pre-focused tungsten double filament bulb (British Pre-Focus or BPF for short).
The double filament bulb gave the welcome safety feature of the driver being able to dip the beam to prevent
dazzling oncoming traffic. To start with, the reflectors were silver plated onto brass, but by 1950 the reflective
surface was an aluminium coating onto steel which was cheaper and gave a much better light. The lens was
also developed using a system of small prisms which improved the shapes of both the main and dipped
beams. The BPF headlamp was fitted until 1963. Lucas used RHD to indicate both Right Hand Drive and Right
Hand Dip. For clarity on these pages we are using ‘dip to the left’
STANDARD BPF P700 TRIPOD LE MANS 24 HOUR LIGHT UNIT WITH
LIGHT UNIT (RHD) LIGHT UNIT (RHD) LIGHT UNIT SIDELIGHT (RHD)
This light unit, without Although Lucas tried to This was another “special” Quality reproduction with
sidelight, and with ‘Lucas’ keep things standard, some with a VERTICAL DIPPED many car applications that
on the centre of the glass is “specials” were inevitably BEAM when used with bulb include replacing the Lucas
still available. Dips to the left produced, one of which LLB370. Vertical dip original on motorcycle SS700P
LUB300 was the light unit shown PF700 headlamps. Dips to the left
£31.05 each | £27.00 ex VAT above. Dips to the left £138.00 each | £120.00 ex VAT 516798/R
With sidelight SD/LUB365 P700/R £22.43 each | £19.50 ex VAT
£35.65 each | £31.00 ex VAT £45.77 each | £39.80 ex VAT
7” SEALED BEAM LIGHT UNITS
In America they were starting to use “sealed beam” headlamps. The complete sealing of the lens and reflector in
a single all glass gas-filled unit protected the reflector completely. There was no separate bulb. Wattage ratings
were increased, giving more light for driving, but less dazzle due to the improved configuration of the front lens.
Lucas thought they would be more expensive to make than the type with the separate bulb. However, cars were
improving and drivers of the faster cars, capable of 70 mph (100+ kph) were growing dissatisfied with the power of the
standard headlamps. As a result Lucas set up to manufacture the “sealed beam” light units and from 1959 they were in
production. Vauxhall were the first customer followed by Ford and BMC. Sealed beam light units are still made by Lucas:
60W/45W 75W/50W 60W/50W 75W/50W
LIGHT UNIT (RHD) LIGHT UNIT (RHD) LIGHT UNIT (LHD) LIGHT UNIT (RHD)
Dips to the left Dips to the left Dips to the right Dips to the left
Without sidelight SSB7002 With sidelight SB7019 Without sidelight SB7029 With sidelight & with ‘Lucas’
£11.65 each | £10.13 ex VAT £16.10 each | £14.00 ex VAT £11.65 each | £10.13 ex VAT moulded in the glass
With sidelight SB7014 SB7019/LUCAS
£11.65 each | £10.13 ex VAT £32.35 each | £28.13 ex VAT
‘E’ MARKED
WIPAC HEADLAMP ASSEMBLY
Sealed Beam headlamps are also made by Wipac which
are available as a kit. They are 12V and give main beam
and have a sidelight window. The kit includes a plastic
backshell and adjusters and a nice chrome rim which
measures 212mm at the rear. They are E marked and would
be ideal if you are building a kit car. Dips to the left
SD/010.047 £43.04 each | £37.43 ex VAT
Sealed Beam light units can be used as direct replacements for BPF (with new connection) and UEC units.
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