Well, what my dad did was he went to a store that sells bikes and biking equipment, and he asked for some lights for out bikes. He bought them, came back home, and just put them on the bike. You have plenty of different versions and shapes of lights for bikes. Just go there, and they will help you with your choice. In case you are not sure how to put them, you can always cycle to the store, and ask the men behind the counter to do it for you.