This ETC Source Four ellipsoidal light comes with a stage pin plug and a bulb. However, a C - clamp is not included.

To use this ETC Source Four ellipsoidal light, first connect the stage pin plug to a suitable power source. Then install the provided bulb into the light fixture. When setting it up on a stage, remember that you'll need to use your own C - clamp as it's not part of the package. As for maintenance, keep the light clean by gently wiping it with a dry cloth regularly. Avoid using abrasive materials as they may damage the fixture. Also, make sure to turn off the power before any cleaning or bulb replacement to ensure your safety.