Using this 7kW Christie switching ballast is easy. First, make sure your projector is turned off. Then, connect the ballast to the correct power source and to your Roadie 25K, HD+30K, or HD+35K projector. Once connected, you can turn on your projector. Remember to always use the correct power supply that comes with the ballast. For maintenance, keep the ballast in a clean and dry place. If you notice any issues, such as flickering or unusual noises, turn off the projector and check the connections. Don't attempt to open the ballast on your own as it may contain electrical components that can be dangerous.