Lampholders for tubular fluorescent lamps and starterholders|Watertightness tests, Dielectric-strength tests, Dimensions, Corrosion tests, Heating tests, Rated voltage, Tubular lamps, Fluorescent lamps, Dust-tightness tests, Marking, Electrical insulation, Leakage paths, Electric terminals, Stress corrosion, Torsion testing, Mechanical testing, Clearance distances, Lamp caps, Holding devices, Lighting equipment, Classification systems, Impact testing, Protected electrical equipment, Fire tests, Endurance testing, Test equipment, Rated current, Starters (lamps)