There are several things about this light that make it very good. It's small. it has a good mounting (a band capable of fitting nearly anywhere you like, it runs for ages on two AA batteries, it's weatherproof and it costs under £20. For being seen, this is a great little unit, but it's not that great for seeing where you are going. Then again, it is clearly not intended for that kind of use. The first mode when turned on is flashing, making it legal, and the second mode is constant. By far the best aspect of the light is how visible it is from the side. The LED's are quite far forward in the reflector, making it more noticeable because it's more than bright enough to attract attention. Of all the lights on test this is by far the best as regards visibility form obtuse angles.
For being seen, this is a wonderful light, and the price is fantastic.
Small but bright from all angles and with a simple tool-free mount that works well. Powered by two AA batteries this light gave well in excess of Cateye's claimed run times of 80 hours constant and 320 hours flashing (we recorded 91 and 328).The LEDs are set forwards in the open lens design, making the impressive light output for such a small unit really stand out from the side and obtuse angles, and although it's not bright enough to ride with on dark roads at speed, this is a cracking little light to be seen with. When you power up the unit it starts in flashing mode so that when your batteries are running low you do not need to cycle through the full power setting first, resulting in a light that will at least flash to get you home on virtually flat batteries.
Typical Cateye - well made, functional, well thought out and affordable