I've just completed the second glow test of my C2A build and am uncertain of what I'm seeing. One of the tubes (left socket) glows at the bottom and top, the second tube (right socket) only glows at the bottom. I switched the tubes and this time the right socket tube glowed top and bottom while the left socket tube only glowed at the bottom. Does this indicate that there is something wrong with the tube since it's not glowing top and bottom? Thanks for the help!