HELLA side marker lights. Side marker lights are an important safety feature that make the outline of a vehicle more visible to other road users, especially in the dark. Especially vehicles with large dimensions such as combine harvesters, long transporters, etc. can be displayed much better in this way. In some countries, active side marker lights are required by law from a certain vehicle length. HELLA side marker lights meet the highest requirements even in demanding fields of application and impress with their durability and the well-known high HELLA quality.