This specification applies to ordinary incandescent lamps for general lighting purposes having a nominal life of 1000 hours a rated voltage of 25 - 1500 watts@ inclusive a rated voltage of 100 - 250 volts@ inclusive bulbs clearor internally frosted caps@ normal bayonet or edison screw as set out in Annex I Rating and Life Test requirements are only set out@ however@ for wattages up to and including 200 watts PURPOSE This specification states the technical requirements for the lamps in question@ and the methods of test to be used in determining the quality and interchangeability of the lamps on a scientific basis@ both as regards individual batches as well as the whole production of a manufacturer@ in an endeavor to maintain a community of interest between the purchaser and the manufacturer