Using this fiber optic light source is a piece of cake. First, make sure you have a 9 - 12V power supply with 100mA of current. Connect the light source to the power supply, and its metal body will help keep it cool. To install, simply loosen the clear knob on the LED emitter and slide in a fiber optic tube. You'll start seeing a great lighting effect right away. Remember, this is just the LED part, so you'll need to buy a fiber optic tube separately. When it comes to maintenance, keep it away from water and clean it gently with a dry cloth if it gets dirty. That's all you need to know to enjoy this awesome light source!