DOTT EXTREME EXTREMELY IMPACT-RESISTANT LIGHTING The DOTT EXTREME is characterised by a high light output and extreme impact resistance (≥5 IK 10). This circular luminaire is suitable for challenging applications such as tram/bus/metro and train stations and prisons. In addition, the DOTT EXTREME, like the other units in the DOTT family of luminaires, can be used for exterior lighting in entrances and entrance halls.