The NiteRider Pro 3600 LED Rechargeable Bicycle Headlight is one of the brightest bike lights ever constructed, producing an amazing 3600 lumens! The Pro 3600 utilizes six of the highest performing Cree LEDs available today to achieve this amazing light output. The Pro 3600 is the only bike light available that allows complete customization through NiteRider’s unique DIY Software. This allows the rider to tailor fit their light to the ride. The Pro 3600 is one of the most technologically advanced bike lights ever created.