A neon bulb is a type of electrical lamp that glows when an electric current is passed through it. As the name suggests, neon gas is typically used to create this characteristic light, which radiates a bright, vivid glow. However, there are several other types of gas that can be used to create a similar effect, such as argon and krypton. Synonyms for the term "neon bulb" might include gas discharge lamp, fluorescent lamp, or plasma lamp. Each of these terms refers to a different type of electrical lamp that generates light through a similar discharge process, making them interchangeable with neon bulbs in many cases.