To use this ETC Source Four 750 ellipsoidal light, first, make sure to purchase a compatible bulb and a C - clamp separately as they are not included. Install the bulb carefully following the general guidelines for lighting fixtures. Use the C - clamp to securely attach the light to the desired location on the stage. When using, keep it away from water and high - humidity areas. For maintenance, regularly check the stage pin for any signs of damage. If the light seems dim, it might be time to replace the bulb. Also, clean the exterior of the light with a soft, dry cloth to keep it looking good and functioning well.