In the lighting industry, the term “Gu” refers to a specific type of bulb base used for various lighting fixtures. The “G” in Gu stands for “multiple pins as a connector,” indicating that the bulb has more than one pin for connecting to the socket. This design allows for a secure and stable connection between the bulb and the socket. The “U” in Gu stands for “universal,” suggesting that the bulb is designed to fit in a variety of socket types. This versatility makes Gu bulbs widely used and compatible with different lighting fixtures.