Purchasing a set of bike lights is an essential accessory if you will be riding in the hours of darkness. This is just not so the motorists can see you but so you can light the way for yourself, whether you are on a training ride or on the commute home. Bicycle lights are the law, so every cyclist must have front and rear lights as soon as the day light starts to fade.
The bicycle lounge recommends LED bike lights as these are brighter and use less power, so battery life is maintained. All bike lights now have various functions from flashing to constant. Rechargeable lights are a must for riders using their bikes to and from work as these produce more power and also in the long term are much cost efficient.