The entire Mega Series performs long-term trouble-free LED operation in bollards featuring various diffusers. Dust or condensed water inside is prevented by using an IP65 rated dual compound plastic housing recessed in the sturdily fixed and corrosion-free column that is continuously ventilated by stack-effect using gaps below the diffuser and at the fixing plate. Specifically laser-etched light guides provide ideal light distributions despite light emanating upwards from the LED (with heat sink and driver inside the recessed can). Simplicity was consequently implemented when it came to change of wearing parts (bayonet locked diffuser and light-engine can).