Last night while waiting for my wife got out of the office, a guy on a bike pulled up to a store across the parking lot. What caught my eye was the small LED lights he had on several of his spokes. They were very attention-getting. When he parked his bike and went into the store, the lights went off automatically and when he came out and got back on his bike the light turned on automatically. I've seen similar lights but nothing that has this auto feature.

Does anybody have an idea on what these lights might be? I wish I had gone over and asked him about them.