Spend money on lights. It's worth it. Even if you don't need it to see by, I'd still get a bright light, especially if you'll be against a backdrop off streetlights.

I have a Magic Shine MG-808. On its brightest setting, it's easily as bright as a motorcycle headlight. On its lowest, it's a great "be-seen" light. The light is attached with a simple rubber-band loop that is easy to put on and take off.