This ellipsoidal light comes with a stage pin plug and a bulb, but a C - clamp is not included.

To use this ETC Source Four 750 19 Degree ellipsoidal light, first connect the stage pin plug to a suitable power source. Then, install the provided bulb if it's not already in place. When positioning the light, be careful as it doesn't come with a C - clamp, so you'll need to find another way to secure it. As for maintenance, make sure to turn off the light and let it cool down completely before cleaning. You can use a soft, dry cloth to wipe the surface. Also, check the bulb regularly and replace it when it burns out. Avoid using harsh chemicals or abrasive materials on the light to keep it in good working condition.