This section of IEC 60598-2 specifies requirements for lighting chains fitted with series- or parallel- or a combination of series/parallel-connected incandescent lamps for use either indoors or outdoors on supply voltages not exceeding 250 V. NOTE 1 ?A Christmas tree chain is an example of a lighting chain fitted with series or serieslparallel connected lamps. A chain for illuminating ski-tracks or promenades is an example of a lighting chain fitted with parallel connected lamps. NOTE 2? For lighting chains fitted with lampholders of the push-in type@ the appropriate requirements of this section apply. NOTE 3? In some countries the term "strings" is used instead of "chains". NOTE 4? For lighting chains with non-standardised lamps (e.9. lamps of the push-in type) the lamps are regarded as a pari of the lighting chain and consequently included in the testing (and thereby in the certificate@ if any).