Be seen in the dark
A simple light that is enough to be seen by others can be sufficient for you to ride safely at night plus it will prevent you from getting a ticket. The brightest light is not needed if your riding in the early evening and you general path is well lit.
If your riding during the evening or very early morning a stronger light is recommended. Several brands have made their version of a Light bar or something equivalent. Light bars have a front and rear version to it; both lights are usually rechargeable by plugging a USB from the light into a computer or a wall outlet. The front light has a specific mount to connect it to the handlebar; the rear light has two mounting options, one mounts it to the seat post and the other to the rails on the back of a seat. Both the front and rear light mounts stay on the bike but allow the light itself to be removed with a release button. These lights are pretty strong and are visible at a distance. The lights don’t reach very far to illuminate the road far ahead but the light spreads very widely in front and behind making the cyclist very visible and much less likely to have any accidents from not being seen. Steady, flash and multiple modes in between.
If your riding during the evening or very early morning a stronger light is recommended. Several brands have made their version of a strong light that greater range to its illumination. there is not specific title to a strong light else than a "strong/bright" light. But this quality light is great for riding at night or early morning. this light is strong enough to illuminate the road far ahead (about 15 yards). This type of light will have a steady, flash and multiple in between illumination mode. They are almost always USB rechargeable and usually have rear light partnered with it that is just as strong but red for the rear. highly recommended if you plan to ride a path that poorly illuminated, consider this; the better you can see the road, the faster you can go.