that world's lowest car is meant to be legal - you seen that one ?
http://www.flatmobile.co.uk/
yeah, I think that may not be the case now.... used to be~24" though
The Road Vehicles Lighting Regulations 1989
Made 28th September 1989
Laid before Parliament 11th October 1989
Coming into force 1st November 1989
Part 1 Schedule 5 (regulation 18 & 20) Requirements relating to obligatory main-beam headlamps and to optional main-beam headlamps to the extent specified in part 2
1. Number- a) Two
2. Position- a) Longitudinal: No requirement
b) Lateral- i)Where two main headlamps are required to be fitted-
(A)Maximum distance from the side of the vehicle: The outer edges of the illuminated areas must in no case be closer to the side of the vehicle than the outer edges of the illuminated areas of the obligatory dipped-beam headlamps.
c) Vertical: No requirement
5. Markings- a) An approval mark or a British Standard mark
7. Colour: White or Yellow
8. Wattage- a) No requirement
10. Electrical connections- a) Every main-beam headlamp shall be so constructed that the light emitted therefrom
i) can be deflected at the will of the driver to become a dipped beam or,
ii) can be extinguished by the operation of a device which at the same time either-
A) causes the lamp to emit a dipped beam, or
B) causes another lamp to emit a dipped beam.
12. Other requirements- a) Every main-beam headlamp shall be so constructed that the direction of the beam of light emitted therefrom can be adjusted whilst the vehicle is stationary.
Part 2 Schedule 6 (regulation 20) Requirements relating to optional front fog lamps
1. Number- a) No requirement
2. Position- a) Longitudinal: No requirement
b) Lateral-
i) Where a pair of front fog lamps is used in conditions of seriously reduced visibility in place of the obligatory dipped beam headlamps-
Maximum distance from side of vehicle: 400mm
ii) In all other cases: No requirement
c) Vertical-
i) Maximum height above the ground-
A) 1200mm
ii) Minimum height above the ground: No requirement
4. Alignment: To the front and so aimed that the upper edge of the beam is, as near as practicable, 3 per cent below the horizontal when the vehicle is at its kerbside weight and has a weight of 75 kg on the driver's seat
7. Colour: White or yellow (12/99)
But
Schedule 4 - relating to dipped obligatory and optional front lamps. This says that only 1 pair of dipped beam lamps can be illuminated at any one time. It also says that the lamps are not to be lower than 500mm and not higher than 1200mm and not more than 400mm from the side of the vehicle.
1) If the extra lights come on with the main beam, then Schedule 5 applies and relates to obligatory main-beams and optional main-beams (i.e. front driving / fogs). Have to be no closer to the side of the vehicle than the outer edges of the illuminated areas of the obligatory dipped-beam headlamps (i.e. the pop ups). There is no requirement on separation of the additional lamps or the vertical position.
2) If they come on in conjunction with obligatory dipped headlights they have to also be dipped or extinguished.
3) If they are on without the headlights (dipped or main beam) then they are fog lights. They should only be used in "conditions of seriously reduced visibility IN PLACE OF the obligatory dipped-beam headlamps". So as long as the obligatory headlamps are lit (either main or dipped-beam) then there is no requirement for the horizontal position of the lamps only that they must be up to a maximum height of 1200mm.
4) A vehicle with 3 or more wheels that is capable of exceeding 25mph first used on or after 1st April 1991 can have 2 and not more than 2 dipped beam headlamps, they must be a matched pair and that their electrical connections are such that not more than 1 pair of dipped beam headlamps is capable of being illuminated at a time. (12/99)