Although the c5 has two large reflectors built into the rear light assembly, for peace of mind I still like to make sure I can be seen by other road users.
To help make the c5 more visible I've been adding various types of flashing lights, some have proved to be better than others.
The cheapest was from one of the "pound shops" ;
Although this was really cheap, it wasn't that good. The batteries kept falling out causing the light to stop working. Even when it was working, the light wasn't very bright.
The lens broke when opening the casing to replace the batteries, and now the bracket that holds the light has also snapped.
Even though it costs so little, it cannot be recommended