Even though the blade is a glass tube, that is in a Plexiglas tube for protection, It still shouldn't be used for fighting. The blade light flickers sometimes when you swing it or tilt it, but usually it stays lit. The light or LED within the saber shines through the electron tube, illuminating it and its internal components. Note that if you are adding a blade to the saber, you will not need this part. Both tubes and available from The Tube Store .
More information is posted on the parts list .