4.5.1.5.1. In case of the principal passing beam, one or two filament light sources approved according to UN Regulation No. 37, one or more LED light source(s) approved according to UN Regulation No. 128 and/or one or more LED module(s). In the case of the use of additional light source(s) and/or additional lighting unit(s) to provide bend lighting, only filament light sources approved according to UN Regulation No. 37, LED light sources approved according to UN Regulation No. 128 and/or LED modules(s) shall be used. a0c0