Exposure Lights Link Plus Mk4 - Front & Rear combo DayBrightA front and rear combination helmet light that now has been upgraded output to 450 lumens front and 50 lumens rear. Prominent illumination whether commuting, training or just riding, day or night Has the option of being used as either front, rear, or both Link+ sits high above traffic with 360 degree visibility and the power to be seen over a kilometer away And with the option of the DayBright pulse pattern you can make sure you are seen, day or night