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Tunnel Lighting
It is very important to ensure that the tunnels are well lit so that the various activities and operations involved in tunnelling can be carried out effectively and safety. The common types of lighting equipment normally used in tunnel are electric lights, coal gas or acetylene gas lights, or lanterns. Electric lights are considered the best option, as these radiate bright light of required intensity, are free from smoke, are easily maneuverable from the point of view of extension, etc.
Places where plenty of light should normally be provided are operation point, equipment station, bottom of shaft, storage points, tempering stations, underground repair shops, etc.