Housing: ABS. Diffuser: vandal resistant clear policarbonate, V2 self-extinguishing, UV-stabilise, anti-glare frosted inside; smooth. Wiring: Emergency S.E.: In case of 'black-out' the lamp turns on. It stays on from 60 to 180 min. and charges in 12 hours. Emergency S.A.: In case of 'black-out' the lamp never goes out. It stays on from 60 to 180 min. and charges in 12 hours. Photobiological risk: exempt risk group according to EN62471. : EN60598-1. They have a degree of protection according to the EN60529 standard.