5 of 6 people found the following review helpful
Your search for a great rear light ends here,
This review is from: RSP Astrum Super Bright Rear Light One Size, No Colour (Misc.)
Light measures about 6cm (W), 2cm (H) and 3cm (D). Quick release mounting is plastic jubilee clip type. Bracket has angle adjustment but only about 30 degrees, so plenty if mounting on seat post, but possibly not enough if you are looking at mounting on seat stays.
Light has 2 super bright LEDs (these will give your car's fog lights a run for their money!) with constant on, flash together and alternative flash modes complete with a big `glove friendly' central on/off button.
If a car driver can't see you with these lights, they must be blindfolded and/or possibly dead!