Rear Light Wattage

[nelmo]

While preparing to install my rear light clusters, I may have ended up getting the lens units swapped around. In each unit, I have a 5W bulb and a 21W bulb - is there any standard for which of these must be the brake light and which the indicator?

 

Despite searching the web, I cannot seem to find an obvious answer to this seemingly trivial question (and nothing in the IVA manual either).

Edited March 6, 2017 by nelmo

[Longboarder]

Brake light 21w

Rear light (called a position light) 5w.

100% certain.

 

Nigel

[Jez Morton]

Indicator also 21watt.

Is the stop and tail light not combined 5w and 21w in same bulb?

 

Jez

[nelmo]

Indicator also 21watt.

Is the stop and tail light not combined 5w and 21w in same bulb?

 

Jez

 

Ah, that's possible - I remember 2 wires going into 1 of the bulbs but didn't think to look at the filaments - I'll check it tonight - many thanks...

[Guest snowy2]

no wattage requirement from memory..

C+U regulations.....http://www.legislation.gov.uk/uksi/1989/1796/schedule/10/made

[Guest snowy2]

 

8. Wattage–

 

(a) A stop lamp fitted to a motor vehicle first used before 1st January 1971 or a trailer manufactured before that date and a stop lamp bearing an approval mark:

No requirement

 

( Any other stop lamp:

15 to 36 watts

 

9. Intensity:

No requirement

this is an excerpt from the C+U regs...only stop lamps have a wattage.......15-36 watts.