Hi Lia,

You ask...

    "So, focusing it, could it be that in some cases, for some time, there will not be any light anywhere in the tunnel whatsoever? I am asking it because I feel it is important to let know that this might happen and that it is okay too!"

So this comes intuitively: in this particular tunnel, don't look for light, and don't attach to the dark either - which I feel quite frequently you do. You're not looking for anything. Settle in that which precedes the light and the dark. Know beyond what you see or feel. Beyond any phenomenal experience. Then there is no tunnel. It disappears. The confines that you set for yourself burst open.

Open <3