Then the LORD said to Moses, “Stretch out your hand toward the sky so that darkness will spread over Egypt—darkness that can be felt.” So Moses stretched out his hand toward the sky, and total darkness covered all Egypt for three days. No one could see anyone else or leave his place for three days. Yet all the Israelites had light in the places where they lived.
Exodus 10 : 21 - 23
"There's light at the end of the tunnel." Have you ever heard that? It's supposed to be comforting. For the believer, it should be disconcerting.
Usually that saying is used to emphasize that there will be an end to your current bad situation, your current discomfort, or your current struggle, shortage and lack. For the believer, there is no need for an end of the tunnel. Yes it would be nice to have an end to struggle and trials - and we all will someday. But even if your 'current' does not allow you to view the light at the end of the tunnel, have hope!
Just as the Israelites "had light in the places where they lived", we too, as believers have that light.
If the only light you are looking for is at the end, your "current" is going to stink. You are supposed to have light in your "current" - your here and now. When Jesus lights up your current situation, you won't even realize that you are in a tunnel!
He is in you.