If you’re cycling the streets at night, bike lights are essential. Actually, in most states, they’re the law: from the half hour after sunset to the half hour before sunrise, your two-wheeler should be emitting out a beam of white light from the front, and red from the rear.
But bike lights get stolen all the time. (Probably more than bikes themselves, and that’s saying something.) It can be a hassle to take them off every time you lock up. But it doesn’t have to be this way.