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*Clear glass or diffuse glass outer bulb | *Clear glass or diffuse glass outer bulb | ||
*Coiled-coil tungsten-wolfram incandescent filament supported on 1 or 2 intermediate points | *Coiled-coil tungsten-wolfram incandescent filament supported on 1 or 2 intermediate points | ||
* | *Vacuum (15W) or gas-filled bulb (25W to 200W) | ||
*E14, E27 or E40 base | *E14, E27 or E40 base | ||
*Color rendering index Ra of 100 (the filament is a true blackbody emitter) | *Color rendering index Ra of 100 (the filament is a true blackbody emitter) | ||