Foglights wont work, as they will still be on when you flick on to full lights, and then you will fail for having fogs on... They also wont comply with a chunk of the ADR i have posted below.
Do it properly, do it once.
Parking lamp
White in front, red at the rear, amber if reciprocally incorporated with side –direction-indicators or side marker lamps.
~~~~~~~~~~~~~
2.7.19. "Front fog lamp" means a lamp used to improve the illumination of the road ahead of the vehicle in case of fog or any similar condition of reduced visibility.
2.7.22. "Parking lamp" means a lamp which is used to draw attention to the presence of a stationary vehicle in a built‑up area. In such circumstances it replaces the front and rear position lamps;
~~~~~~~~~~~
Few differences there in the ADR as to how bright the light would be
~~~~~~~~~~~~
6.12. PARKING LAMP (Regulation No. 77 or 7)
6.12.1. Presence
On motor vehicles not exceeding 6 m in length and not exceeding 2 m in width, optional.
On all other vehicles, prohibited.
6.12.2. Number
According to the arrangement.
6.12.3. Arrangement
Either two lamps at the front and two lamps at the rear, or one lamp on each side.
6.12.4. Position
6.12.4.1. In width: that point on the apparent surface in the direction of the reference axis which is farthest from the vehicle's median longitudinal plane shall not be more than 400 mm from the extreme outer edge of the vehicle.
Furthermore, if there are two lamps, they shall be on the sides of the vehicle.
6.12.4.2. In height:
For M1 and N1 category vehicles: no special requirement;
For all other categories of vehicles: above the ground, not less than 350 mm nor more than 1,500 mm (2,100 mm if the shape of the bodywork makes it impossible to keep within 1,500 mm).
6.12.4.3. In length: no special requirement.
6.12.5. Geometric visibility
Horizontal angle: 45° outwards, forwards and rearwards.
Vertical angle: 15° above and below the horizontal. The vertical angle below the horizontal may be reduced to 5°, however, if the height of the lamp is less than 750 mm.
6.12.6. Orientation
Such that the lamps meet the requirements for visibility forwards and rearwards.
6.12.7. Electrical connections
The connection must allow the parking lamp(s) on the same side of the vehicle to be lit independently of any other lamps.
The parking lamp(s) and, if applicable, the front and rear position lamps according to paragraph 6.12.9. below, must be able to operate even if the device which starts the engine is in a position which makes it impossible for the engine to operate. A device which automatically deactivates these lamps as a function of time is prohibited.
6.12.8. Tell‑tale
Circuit-closed tell‑tale optional. If there is one, it must not be possible to confuse it with the tell‑tale for the front and rear position lamps.
6.12.9. Other requirements
The functioning of this lamp may also be performed by simultaneously switching on the front and rear position lamps on the same side of the vehicle. In this case, lamps that meet the requirements of front or rear (side) position lamps are deemed to meet the requirements of parking lamps.
http://www.comlaw.go...A2575FC0030BA51