Auxiliary Lamp Series FF 50 and FF 75. There are vehicles whose small dimensions or lack of mounting options make it difficult to use conventional auxiliary lamps. This is why HELLA engineers expanded the FF series to include several high - performance compact models. To ensure that your light is always where you need it. The FF series is available in 2 model variants the FF 50 with an oval design and the FF 75 with a flat design. Both variants are available as highbeam headlamps and fog lamps. Thanks to the metal bracket, universal assembly is possible either in the upright or suspended positions.