File talk:Electric bulb filament.jpg
coiled-coil, reduced power, upside down[edit]
Doppelwendel, reduzierte Spannung, schätze 1/10 Leistung, dadurch sieht man die Kühlwirkung der Halte- und Zuführungsdrähte gut und erscheint der Hintergrund angenehm hell. Bild gestürzt, sollte um 180° rotiert werden Drähte haben sich durch Betrieb nach unten "durchgehängt". (de)
Coiled-coil filament, reduced voltage, therefore possibly 10% of wattage = mainly heat production, makes darker = cooler regions around the 4 holding wires visible very fine. Picture is upside down, as filament has hung downwards by gravity - during longer hot time period, even if actually driven in the shown position. Rotate pic that filament is held from above. --Helium4 (talk) 14:24, 25 November 2013 (UTC)
I recommend still the same – rotate the picture by 180° – until now its orientation is upside down. --Helium4 (talk) 06:37, 30 January 2020 (UTC)
