This ETC Source Four 750 Ellipsoidal Light comes without a bulb or C - clamp and features a stage pin. Note that it doesn't include a bulb or a C - clamp.

To use this ETC Source Four 750 Ellipsoidal Light, first, find a suitable place to install it using the stage pin. You'll need to get your own bulb and C - clamp as they are not included. When you turn it on, make sure the power supply is stable. For maintenance, keep the light clean and check the connections regularly. If there are any issues with the light not working properly, check the power and the bulb first. Don't try to open the light fixture by yourself as it may be dangerous.