After returning home from a recent trip, I began to wonder about my night-time visibility to cars approaching from the rear, since I can at least see what's coming at me from up ahead. I always wear a reflective vest at night as well as a blinkie on my Bell Metro helmet. The Xtracycle also has a bottle-dynamo driven light set, but it's the many added reflectors that seem to be doing the most good.
Day...(notice LED standlight)
I think adding some reflective tape to the corners of the H-racks would seal the deal...