I'm fairly impressed with the Bontrager Flare R and RT taillights. USB rechargeable, visible day or night, and with a variety of mounting clips available. I install them on the rear of the trunk back (flat mount), and the angled seat stay. They work very well. Can't say that I've tried the "bag" clip variation. I've never had too much trust in how modestly those things clamp on. Not positive enough on the attachment, for my money.