Lezyne femto drive duo light setthe femto duo is a two in one safety light integrated into a versatile helmet mount this light set features a front and rear light coupled by a composite matrix junction thats compatible with nearly all vented style helmets the leds are in a super compact lightweight and durable machined aluminium body the high grade polycarbonate lenses provide side visibility and double as the power button the front emits 15 lumens while the rear puts out 7 lumens both fr