I put
this rear light on the seat post today. It replaced a rear light that I've been trying out.
Before saying more, let me say I don't have a problem with the Lineo that came with the CCS. I just wanted a blinking light too. I use both, most of the time.
So, the one I was using worked okay. It wasn't quite as bright as I'd like, for daylight use. Also, it has an accelerometer, so it goes from blinking mode (several patterns you can choose from) to all 5 LEDs at max brightness. The accelerometer is so sensitive, it doesn't just go to braking mode when I put on the brakes, but at virtually any motion, such as an abrupt turn or a bump in the pavement.
I saw
this video about a rear light that looks pretty good. My wife wanted a turn signal light so I thought we'd try this one. (If you haven't seen kobEVision's videos about his trial runs with the CCS, they are entertaining and informative. Enjoy!)
I myself don't care much about the turn signals, although they are kind of cute and might actually get a cage driver's attention. I do like that the light is larger and brighter than the one I was using, and the blinking mode functions as advertised.
It also projects those laser lines on the pavement. I get the theory that it might give car drivers some idea of how much space to leave when they pass you. I'm skeptical on that score. Also, they don't show up in sunlight -- tested that when I installed them on both bikes this morning. I will be coming home from a meeting this evening right at sunset/dusk, so I'll have a better idea of how well they actually show up.
Even if they don't serve to maintain a safe distance from cars, if they make me more visible in the dusk or the dark, I'm good with it.
I'll post a note when I have more experience with them. I'll be able to see my wife's light next time we ride together and that will give me a good idea of how well this works.