An electric light in which a filament is heated to incandescence by an electric current
An electric light in which a filament is heated to incandescence by an electric current usually tungsten
Size: 4029px × 6043px
Photo credit: © Steven Heald / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: alva, beacon, british, bulb, change, dark, darkness, davy, edison, electric, electricity, emit, filament, fit, fitting, gas, glass, heald, hot, humphrey, idea, illuminate, invent, invention, lamp, light, lightness, northern, npower, pendant, radiation, screw, shade, shadow, sir, source, standard, steve, swan, swann, thomas, tungsten, ureka, wall, wavelength