I took my bike up to the top floor of a parking garage at night. It gave me the ability to use all the different lights the garage, city, and night provide. Long exposure’s really help to amplify the use of color. All the colors, lighting, and lens flares are all natural. Saturation and levels were the only adjustments.
What I learned from this is that when doing a long exposure you never know what colors will pop. In this case it was some blue from an emergency call box and some yellow from the floor beneath. Both of which I saw when walking around but neither of which I knew would have such a drastic impact. It’s a great learning experience to play with some long exposures.