A carbon filament lamp using
chlorine to prevent darkening of the envelope was patented
 in 1882, and chlorine-filled "NoVak" lamps were marketed in 1892.
 The use of iodine was proposed in a 1933 patent,
 which also described the cyclic redeposition of tungsten back onto the filament. In 1959, General Electric patented
 a practical lamp using iodine.
In 2009, the EU began its
phase-out of inefficient bulbs. The production and importation of directional mains-voltage halogen bulbs was banned on 1 September 2016. Non-directional halogen bulbs are set to follow on 1 September 2018.