To use this ARRI 300 Plus light, first make sure you connect it to the included correct power supply. Then, you can adjust the light according to your needs. Note that this product doesn't come with a lamp, so you'll need to get one separately. When it comes to maintenance, keep the light clean and dry. Don't expose it to extreme temperatures or moisture. If there are any issues with the power supply, stop using it immediately and check for problems. This way, you can ensure the long - term performance of your light.