When riding at night, it’s just as important to ensure you make yourself seen by other road users as being able to see the actual road. You are required by law to fit a front white light, a red rear light and a red rear reflector at night. Amber pedal reflectors are also required.
So what type of lights should you choose? It largely depends on what type of cycling you are doing, but generally speaking there are two types of lights: those that help you be seen by others and those that help you see where you are going. For most urban situations, the former should be sufficient, but in areas that are very dark, such as country lanes, you will need a more powerful front light to help you see the road ahead of you.
There are some very useful guides online to help you decide which lights are best for you such as Bikeradar lights guide or on the Wiggle website: