Note: Some links in this post are affiliate links
Earlier this week, in the early morning before I went to work, I went to some subways in Linz to shoot pictures of the street art there. I took my Alpha 7, a Tripod and two Minolta Rokkor lenses (the MD Rokkor 45mm and the MC Rokkor 35mm 1.8) and took the tram to Wifi/Linz AG. There is a subway under Wienerstraße with really cool graffiti:
It was still very dark outside, so the only light was the street lamps and the neon light in the subway. I shot long exposures (mostly around 4 sek) to keep the ISO numbers down.
Then I took the tram number 3 to Untergaumberg. There is another subway painted in graffiti. The sun was already rising, so the graffiti were not only lit by the neon lights, but also by some natural ambient light: