The HL-EL520 has a high power LED combined with OptiCube™ lens technology to shine at more than 1800 candlepower. Features a compact design, high/low beams, and more than 150 hours of runtime in low beam on 4 AA batteries. It features a side visibility and FlexTight™ bracket. TL610 - A must-have for urban night riding. The new TL-LD610 is slimmer and brighter than its predecessor, with five LEDs and four modes that maximize your visibility. The FlexTight™ bracket fits all bikes and mounts horizontally or vertically to maximize adaptability. The new low-profile switch eliminates accidental switch-on/off, especially inside your pack. Runs up to 30 hours on constant mode on two AAA batteries.
Cateye EL520 Features:
Uses 4 AA batteries
More than 150 hours of runtime in low beam
FlexTight™ mounting bracket
Cateye TL610 Features:
5 red LEDs
Runs over 30 hours on constant or 60 hours on flashing
4 modes (flashing, constant, side to side & random)
FlexTight™ universal mounting bracket
Highly water resistant
Buy Cateye Lights at Chain Reaction Cycles, the world's largest online cycling store.