NiteRider's Lumina 700 & Solas Taillight Combo delivers the ultimate commuting package. The headlight puts out a day-making 700 lumens, lasts up to 18 hours, and weighs in at only 172 grams! The 2-watt taillight ensures you'll always be seen by motorists coming up from behind. Attachment is easy, too, on handlebars up to 31.8mm in diameter for the headlight, or with the included seat stay and seatpost mounts for the taillight. Plus, you can charge them both off a computer's USB port!