It’s quite important for Audi R8 drivers to ensure normal fog lights work. It’s of vital importance to buy for R8 fog-lights only BA15S type of base. Usual voltage 12 V is used and power should be at 21 W. With changing all fog lights in R8 4.2 cars made in 2009 make sure you buy original shape. It’s impossible for Audi cars to install other dimensions than recommended for 4.2 motor vehicles.
Less or more voltage than 12 V can destroy reflectors in R8 fog lights. So, in output you can get more than 21 W of power but keeping the base at BA15S. Fog lights of Audi R8 may use huge amount of bulb types.
Carefully install 12 V bulbs into Audi fog lamps. Purchase only top-grade optical devices for Audi R8 4.2 and take advantage on road. In base BA15S producers often offer more than 21 W of real power.