Descriptors | Lighting equipment, Lamps, Electric lamps, Filament lamps, Tungsten lamps, Lamp caps, Domestic, Electrical safety, Domestic safety, Marking, Electrical insulation, Temperature-rise limit, Circuits, Test equipment, Sampling methods, Interchangeability, Approval testing, Endurance testing, Conformity, Acceptance (approval), Statistical quality control, Torque, Leakage paths, Graphic symbols, Heating tests, Testing conditions, Impedance measurement |