NiteRider Pro 600 LED Lithium Ion 2010: The Pro 600 will change the way bicycle lights are made. No longer are you limited by manufacturers specifications. With our new internet based D.I.Y. Software you can now design your own specs. Need more run time? No problem, just lower your output settings. Want more light output? Crank up your lumens to the maximum of 600. You can even customize your own flash rate! With a fully programmable light, the options are virtually limitless, allowing you to tailor fit the light to your ride. A new quick release battery system makes charging fast and hassle free without having to fuss with Velcro straps every time you need to charge your battery. All of this new technology fits into a headlamp weighing less than 100g, making the Pro 600 a truly all purpose light!