Edison light bulbs, retroactively referred to as antique light bulbs, and vintage light bulbs, refer to carbon- or early tungsten-filament incandescent lamps, or modern bulbs reproducing their appearance. Most of these bulbs are reproductions of the wound filament bulbs made popular by Edison Electric Light Company at the turn of the 20th century. They are easily identified by the long and complicated windings of their internal filaments, and by the very warm-yellow glow of the light they produce (many of the bulbs emit light at a color temperature of 2200–2400K).