Varia rear light when deceleration is detected the tail light will change its brightness to alert traffic behind that a cyclist is near and slowing focused light varia lights focus the light where you need it on the road ahead the headlight beam also has a high beam cut off to avoid blinding oncoming traffic while still giving 100 lux at 10 meters automatic light intensity control the brightness intensity of the tail light may be controlled when paired with an edge unit that has light se