The bike lights are important for your safety,also it is illegal to ride at night without lights in some countries.
The front lights are usually very bright, that adopt the high lumen leds,because this must be visible to other people.Also it needs to illuminate the road in front of you.
A rear light must also be visible to others, it project a red-light source which notifies the other drivers and walkers.
The wheel lights are not so bright for the riders, they play a role to improving the the atmosphere at night. Usually the wheel lights are so colorful and display many patterns, that so attractive the people,specially for youth.
We suggest the people install a bright light on front, and one wheel light for fun, you are not only enjoy your riding and also be safety.