This recommendation applies to ordinaryincandescent lamps for general lighting purposes having a nominal life of 1000 hours@ a rated wattage of 25 1500 watts@ inclusive@ a rated voltage of 100 250 volts@ inclusive@ bulbs clear or internally frosted@ caps@ normal bayonet or Edison screw@ as set out in Appendix A Note -- For those countries where there is an interest in lamps of 2500 hours life@ attention is drawn to IEC Publication 64A@ Supplement to IEC Publication 64: Tungsten Filament Lamps for General Service