Question

Joseph Swan independently invented one of these objects that was similar to the Sprengel pump. The oldest-known operating example of these objects is the “Centennial.” Bayonet mounts are sometimes used on these objects, although Bi-pin connectors are more common. “Compact” forms of these objects use toxic mercury. Inert gasses like (*) argon are used in these objects to prevent oxidation. (10[1])Filaments are used in old examples of these objects (10[1])which are being replaced by the more efficient LEDs. For 10 points, (10[1])Thomas Edison invented the incandescent form of what luminous objects whose power can be measured in watts? ■END■

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