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SynopsisThe paper opens with a general review of the problems involved in mine lighting and steps which have been taken to improve conditions in the mines by providing better lighting. Attempts to improve illumination at the coal face over that possible by portable lamps have so far not shown any benefit in increased output but there appears to be evidence of a reduction in accidents,The merits of electric hand lamps and cap lamps are discussed, and suggestions for possible future improvements are made. Alternative methods of providing adequate illumination at the coal face by means of transportable self-contained battery lamps and by mains lighting are discussed at some length and mention is made of the application .of mains lighting to mines in other countries. A description is given of the pneumatic-electric lamp which provides a means of greatly increasing the illumination at the coal face in those pits where, for various reasons, mains lighting cannot be used.The paper deals with the subject of glare and discusses methods for ensuring the maximum reflectivity at the working face.