I got the hippy disco model. I figure by using those, one on each wheel, that they will be out of sync and constantly changing so no matter how blind some driver is they should see at least one of the two colors coming back at them.

I also left the lame, but still functioning, tireflies on as well. When they give up the ghost finally I will just throw them away. They really did suck, particularly when going up a very large hill on my way home and they would turn themselves off. You do have to maintain a reasonable speed for those to stay on. Another big benefit for the Spokelit because it doesn't turn off until I tell it to.

I have to concur with some others who said they were a little distracting. Since I have the disco variety and it is slowly changing colors I found myself looking down to watch it change, which is probably not the smartest thing I could be doing while riding in the dark. Once the novelty wears off I assume I won't do that so much.

I was really impressed with how bright they were though. There are some intersections I pass through where side roads have stop signs, and during the evening commute there are people in a hurry to get home. I want to give them every chance they can to see me.

I was hoping the disco would change colors more rapidly than it does (it slowly changes colors every few seconds), but it is still a huge upgrade from what I had before and I really have no complaints. It was the best purchase under $20 I have made for my commute!

Oh, almost forgot, I run them solid. When I tried blink mode they took an extremely long time to change colors. I also left my stock reflectors on as well, so I have passive and active.