For 2013 BMW offers their own LED aux lights for the F800GS. The kit is called a 'retrofit' since it installed by the dealer or end user. The kit is around $800 just for parts, so it is expensive, and consists of the lights, brackets, wiring harness and a replacement switch yoke. There are multiple parts numbers in the kit priced separately, so I expect you could just purchase the switch yoke, for example. I just had mine installed yesterday, so I don't know how much difference the lights make in the dark, but I like where they are mounted and the fact that they nicely integrate into the bike, including an indicator by the speedo show that the lights are on. I couldn't figure out how to get a good picture of the mounting bracket without turning the bike upside down, but hopefully you can tell from the pictures how the lights mount on the brackets.