An auto-darkening welding helmet comprises a helmet casing (20), an auto-darkening filter (40) installed in the helmet casing (20) and a lighting device (60) installed in the helmet casing, wherein the auto-darkening filter (40) includes a liquid crystal panel (41) which is switchable between a non-opaque state and an opaque state, wherein the lighting device (60) comprises a cable (62) connectable to the auto-darkening filter (40) such that when the liquid crystal panel (41) is in the non-opaque state the lighting device (60) automatically emits light towards a front of the liquid crystal panel (41) and when the liquid crystal panel (41) is in the opaque state the lighting device (60) does not automatically emit light.
