Standard bike lights or Revolights? The choice is wallet-painfully easy. Revolights back up their undeniably badass looks with functionality, making your bike that much more visible at night, particularly when viewed from the side. Each waterproof Revolight is a rim-mounted hoop (one on each side), clipping onto the spokes and outputting an estimated 134 lumens per wheel (in layman’s terms, quite a bit of light). When spinning, the lights blend together and form a fore and aft blade of luminance, lasting for 4 hours per charge.