I like lights-- neon signs, different styles of lampposts, the lights of a city's skyline, stars, the Northern Lights... All of it. There is a pub in Waterloo where I really like the coach lights. They have them spaced all along the building's exterior. I think the features that draw me to these ones in particular are the scrollwork attaching the lanterns to the wall and the texture of the glass (or whatever material the light shines through).
