All stairs are lightened by wall or ceiling lighter. They are also equipped with emergency and evacuations exit lighter. All lighters are LED. Depsite the power of lighters, the flux in the stairs is calculated to be 200 lux. Lighters commendations is made by buttons or sensors, depending on the case. There is used a lightener which has the emergency unit inside it in some cases. Lighter technical data: Protection scale IP65. Voltage: 230V-50Hz. Lifetime: 50000 hours. Led Size: 660x100 (depending on the case). Power: 2x36W (depending on the case). Flux: 3350 Lm Neutral. Emergency unit equipped.