So as you find yourself riding your bike more and more, you're also going to find yourself riding your bike at night. There's a few things that you want to have to prepare for that.
The most important thing is to stay visible to cars as well as pedestrians. Two things that you always want to have on you is a front and rear light. The rear light can attach to both your bike as well as yourself. It's very, very visible and you can be seen for blocks and blocks with it. The front light mounts to your handle bars. It indicates the pedestrians as well as cars that you're coming and it's a great idea. Both front and rear lights are required by law in New York City.
Another good tip for staying visible in New York at night is having a white helmet. White helmets are going to be far more visible than darker helmets. White helmets reflect headlights and street lights really well and keep you visible.
And those are some tips for riding at night.