This ETC Source Four ellipsoidal light comes with a stage pin plug and a bulb, but no C - clamp. It has a known issue where part of the lens barrel is broken, as visible in the photos.

Using this ETC Source Four ellipsoidal light is quite straightforward. First, connect the stage pin plug to a suitable power source. Then, install the provided bulb. When positioning the light, be careful because part of the lens barrel is broken. Avoid putting too much pressure on the broken area to prevent further damage. For maintenance, keep the light clean by gently wiping it with a soft, dry cloth. Check the bulb regularly and replace it when it burns out. Store the light in a dry place to avoid moisture damage.