This part of GB 7000 specifies the safety requirements for portable lamps and similar portable lamps held in the hand or suspended by hooks or rested on a certain plane. The light source used in these lamps is an electric light source with a power supply voltage not exceeding 250V. This section should be used together with the relevant chapters of GB 7000.1. Hand lamps that can be secured to a bracket by thumbscrews, clips or magnets, and luminaires for inspecting the interior of drums and the like, are within the scope of this standard.