What is a Fog light

[Flat Eric]

As a lamp, what is a fog lamp.

Could I wire a high density brake light, to act as a fog lamp?

[Man On The Clapham Omnibus]

I seem to recall that foglights have reflectors but brake lights do not.  Could be wrong tho'

[Kevin Wood]

It has to be red with a 21w bulb or equivalent, same spec as a brake light but there are probably different requirements regarding positioning on the vehicle so provided that's OK I can't see why a brake light would not suffice. It would have to be in addition to the required brake lights, of course!

Kevin

[Flat Eric]

I will be on the look out a Stoneleigh then

Thanks

Kevin

[7SE]

Is this for SVA or MOT   If its for SVA there might be tighter restrictions.  If it is for MOT, and your car has a Q plate, you can get away w/out one.

If it is just for general motoring pleasure, then whatever looks good

[Tigger]

What is a Fog Light

It's a light you put on in the fog

Also, I wouldn't avise putting a  high density brake light on the front of the car for fog lights, it's illegal ......... or do you mean for the rear ....... you didn't specify

Tigger

[Flat Eric]

Car is on the road at moment, thinking about future MOTs.

Just thinking about changing the rear light clusters, and not wanting the usual separate light clusters for Fog and reverse lights.

Had seen some slim brake lights (ie used on spoilers etc) and was planning to fit something below number plate.

7SE good point, a MOT tester will only test a fog light or revervse light, if one is fitted. But would prefer to keep them, if I can find a neat alternative.

[Man On The Clapham Omnibus]

REQUIREMENTS RELATING TO OBLIGATORY REAR FOG LAMPS AND TO OPTIONAL REAR FOG LAMPS TO THE EXTENT SPECIFIED IN PART II

         

   1.    Number:

One

   2.    Position-

   (a)  Longitudinal:

At or near the rear of the vehicle

   (b)  Lateral-

(i)  Where one rear fog lamp is fitted:

On the centre-line or off side of the vehicle (disregarding any sidecar forming part of a motor bicycle combination)

(ii)  Where two lamps are fitted:

No requirement

   ©  Vertical-

(i)  Maximum height above the ground-

(A)  Any vehicle not covered by sub-paragraph (B):

1000 mm

(B)  An agricultural vehicle, engineering plant and a motor tractor:

2100 mm

(ii)  Minimum height above the ground:

250 mm

   (d)  Minimum separation distance between a rear fog lamp and a stop lamp-

(i)  In the case of a rear fog lamp which does not share a common lamp body with a stop lamp:

A distance of 100 mm between the light-emitting surfaces of the lamps when viewed in a direction parallel to the longitudinal axis of the vehicle

(ii)  In the case of a rear fog lamp which shares a common lamp body with a stop lamp:

100 mm

   3.    Angles of visibility-

   (a)  Horizontal:

25° inwards and outwards. However, where two rear fog lamps are fitted it shall suffice if throughout the sector so defined at least one lamp (but not necessarily the same lamp) is visible

   (b)  Vertical:

5° above and below the horizontal

   4.    Alignment:

To the rear

   5.    Markings:

An approval mark

   6.    Size of illuminated area:

No requirement

   7.    Colour:

Red

   8.    Wattage:

No requirement

   9.    Intensity:

No requirement

   10.    Electrical connections:

No rear fog lamp shall be fitted to any vehicle so that it can be illuminated by the application of any braking system on the vehicle

   11.    Tell-tale:

A circuit-closed tell-tale shall be fitted

   12.    Other requirements-

Where two rear fog lamps are fitted to a motor vehicle first used on or after 1st April 1986 or to a trailer manufactured on or after 1st October 1985 they shall form a matched pair.

   13.    Definitions-

In this Schedule "approval mark" means either-

   (a)  a marking designated as an approval mark by regulation 5 of the Designation of Approval Marks Regulations and shown at item 20 of Schedule 4 to those Regulations; or

   (b)  a marking designated as an approval mark by regulation 4 of the Designation of Approval Marks Regulations and shown at item 38 of Schedule 2 to those Regulations.