Med undtagelse af refleksanordninger anses selv lygter med godkendelsesmærke for at mangle, hvis de ikke kan bringes til at fungere blot ved montering af en lyskilde og/eller en sikring.
With the exception of retro-reflectors, a lamp even bearing an approval mark is deemed not to be present when it cannot be made to operate by the sole installation of a light source and/or a fuse.