How do bicycle lights differ?

Bicycle lights can differ from one another in many aspects, such as their shape, size, function, and mounting method. The shape and size of a bicycle light can affect its visibility, as well as how well it will stay attached to the bike frame. The function of a bicycle light may include white or red light, and sometimes it also includes RGB lights. A bicycle light can be mounted using brackets on the bike frame, on the handlebar, or on the seatpost. Bicycle lights may also be equipped with rechargeable batteries that can be charged using a USB cable.

Rear bicycle light - which one to choose? 

There are many factors to consider when choosing a rear bicycle light. Lights may differ from one another depending on their functions, as well as how wide their range is. The information below will help you better understand the differences between lights and how you can choose the best one for your needs. Some of them have only a steady light, but others may have a pulsing or flashing light. Some bicycle lights may also have a brake light function, which will help you be noticed in difficult conditions. Dimensions  Bicycle lights can vary in size. Some are very small and light, making them easy to carry with you, while others are larger and heavier. The type of light you choose will depend on how you want to use it. 

Bicycle light with radar

is a rear bicycle light with a radar sensor that warns the rider about approaching vehicles.
People who are looking for a bicycle light with all functions may consider purchasing a bicycle light with a USB charger.
This is a useful feature because it means you can recharge your light without having to use an additional device.