Stayed up on the crags last night after taking yesterdays firework photo, to watch the 'Speed of Light'outdoor art show that's going on each evening. It basically involves people running around the hillside in a choreographed show, wearing suits which light up! Ended up with my photo for the day taken before I'd even gone to bed! Quite a surreal thing to stand and watch, but impressive and well worth a look for anyone who's in Edinburgh.