The graphic for the tunnel exit is a slow, pulsating, white circle. This persists the entire length of the tunnel while travelling/walking through. Once you come closer to the end, the 'white' is replaced by the outside graphics, but the exit continues to slowly pulsate. This bug continues, even after the lighting issues were fixed in the last patch.
There should be no light at all in them tunnels on that route. i travel that route most days and there is no light in them tunnels even by todays standards, its completely black in there
should of said that there should be 4 shafts of light in morley tunnel. these are called, town end, hopewell farm, america moor and howley park. these air shafts are still in use today. there are vids on youtube, cab rides throught the tunnels that confirm theses shafts. you will also notice that miles platting and park stations are no more.