CatEye continues to make some of the most reliable and visible lights in the business. So, when the company comes up with a totally new product, it's notable to riders everywhere. The new CatEye Rapid X Light is the latest and greatest, and it promises to outshine everything else that came before it. The Rapid X Light crams a ton of great features and great ideas into a mere 22. 5 grams. There are six different operation modes, the most conservative of which keeps the LEDs firing for up to 30 hours. When the battery gets too low to last much longer, it automatically switches to its most frugal flashing mode, keeping the torch lit and indicating to the rider that it's time to charge up again. Yes, the lithium polymer battery is fully rechargeable via USB and only takes two hours to do so. Engineers also focused heavily on the light's side profile, and the Rapid X's perpendicular visibility is perhaps the best of any light system on the road. The CatEye Rapid X Light tool less rubber band mount can accommodate tube diameters from 12mm to 32mm. It measures 74. 2 x 24. 4 x 30. 8 millimeters, and comes in a white light Front version and a red light Rear version.