Hi, I'm trying to understand how neon lights work. I understand that the emitted light comes from excited atoms in the gas, and I know what a neon light consists of. But I'm a little bit confused about one part, how do the atoms get excited? I've seen two different explanations, if I understand them correctly. The first one is that when a high enough voltage is applied to the electrodes, electrons move from one electrode to the other, and when these electrons collide with electrons in the atoms, the energy from the collision is absorbed by the atom's electrons and they get excited. Another explanation, which I don't really understand, has to do with the atoms getting ionized. If anybody could help me with this, I'd appreciate it.