Now this is an interesting subject. Light is such a big part of so many pictures. I hate to replay some of my more recent photos, posted on some other threads. I'm going to see what I can come up with.
ah Ghosthumter's reminds me of one of mine from last year ... perfectly unintentional too (I was after the reflections off the mirrors across the road onto the tarmac, but serendipity stepped in once again)