From: Stephen Leak on
If these are fitted 500mm or less from the road surface, do they
become "fog lights" under the Construction & Use regulations and
Vehicle Lighting regulations, and therefore should only be used in
"seriously reduced visibility", less than 100m, fog & falling snow,
etc.?

If these are fitted between 500mm and 1200mm from the road surface, do
they become "head lights" under the Construction & Use regulations and
Vehicle Lighting regulations, and therefore should be capable of being
dipped in order not to dazzle oncoming road users?
From: Nick Finnigan on
Stephen Leak wrote:
> If these are fitted 500mm or less from the road surface, do they
> become "fog lights" under the Construction & Use regulations and
> Vehicle Lighting regulations, and therefore should only be used in
> "seriously reduced visibility", less than 100m, fog & falling snow,
> etc.?
>
> If these are fitted between 500mm and 1200mm from the road surface, do
> they become "head lights" under the Construction & Use regulations and
> Vehicle Lighting regulations, and therefore should be capable of being
> dipped in order not to dazzle oncoming road users?

C and U says nothing about lights. Additional headlamps do not have to be
dippable, provided you have some other dipped headlamps. Only if you are
replacing your dipped headlamps do they have to be dippable and > 500mm.