Examples are the neon lamp and nixie tubes. The early light source of a neon lamp has now been replaced with super-bright LEDs. Once the neon lamp has reached breakdown, it can support a large current flow. In particular, around 1917 Moore developed a "negative glow" neon lamp. A neon lamp connected to AC will have a glow visible at both terminals. A neon lamp (also neon glow lamp) is a miniature gas discharge lamp. Around 1917, Daniel Moore developed the neon lamp while working at the General Electric Company. An earlier tuning aid which the magic eye replaced was the "tuneon" neon lamp.