Electric lamps for pedal cycles. Colour of light, intensity at various angles, switch performance, resistance to vibration, corrosion, dust, oil, the penetration of moisture. For battery lamps, period for maintenance of luminous intensity from the same battery. Apparatus for making photometric measurements, combinations of filament lamps and batteries known to meet requirements when used with a suitable optical system.Cross References:BS 12BS 350BS 397BS 941BS 1224Road Transport Lighting ActsReplaced by BS 6102-3:1986 but remains current as it is cited in legisla tion. Was withdrawn in error and has been reinstated.Incorporates the following:AMD 4753 published 31 January 1985PD 6137 published 22 May 1967