As topic heading. I'm referring to the brake lights and indicators.

Whilst on some websites says their wares are perfectly road legal, on over sites (if I'm not mistaken) the same products are listed as 'off road' only.

If I remember correctly the regulations used to include specifications for the power of stop, tail and indicators. These are based on incandescent bulbs and normally they are defind by the power consumption and not the light output. If you had a set of LEDs that could draw 21 watts the following drivers would need sunglasses.

It may be that regs have been updated but I doubt it Prog rock is cool!
2012 XS SD4 Indus Silver

Missing link is quite correct. The design of the reflector, lens and wiring volt drop are all designed to meet a ISO pre-determined candle watt output using the standard incandesent bulb.
Should you change to LED and then be involved in an accident, your insurance would take a very dim view if you see my meaning.
In any event, it's not wise to change to LED on exterior lighting; VM's go to great lengths to meet ISO regulations. Any mods by yourself are most unlikley to meet these regs.
Sorry mate, but stick to the O/E tungsten filament and you can't go wrong.

I'm not exactly sure on the laws of modifying to LED lights, but if you really wanted to you can replace the rear number plate light. I replaced mine with white LEDs and they look fantastic in the dark. A slight blue glow, similar to what you see on Lexus. And you don't have to worry about the voltage drop.