Using this fiber optic light source is a piece of cake. First, make sure you have a 9 - 12V power supply and 100mA of current to power the LED cluster. The metal body of the light source will act as a heat sink to keep things cool. To install it, simply loosen the clear knob on the LED emitter. Then, slide one of our fiber optic tubes into place. Remember, this product is just the fiber optic LED, so you'll need to buy a fiber optic tube separately. When it comes to maintenance, keep it away from moisture and dust. If it gets dirty, you can use a soft, dry cloth to gently wipe it clean. Don't try to open the metal body on your own as it might damage the internal components.