Lots of choices for lights. Get a nice, bright "light-to-see" headlight (I use MagicShine 808) and a bright "light-to-be-seen" taillight (I use CatEye Rapid 3).

More importantly, wear lots of reflective clothing if you'll be riding in the dark. A driver will see a floating red light and not take much notice. If they see a fully outlined rider, they'll know what's coming up. I wear a reflective vest from Home Depot, GloGloves, and some reflective ankle straps.