I'm looking for a bright and affordable tail light myself, something that can be seen during the day at a distance, the longer the better since the sooner I'm seen the more time a driver will have to react. I'm hoping that maybe something like the Planet Bike Superflash Turbo might get the job done. With so many different lights to pick from, it's hard to know which is best. I'm having the same problem in picking a wireless speedometer. I know there are some great expensive ones but I'm just looking for an adequate moderately priced one.