Product Description
C1 YELLOW polarized driving lenses clip on. night vision. for blue light blocking more than 75%
C2 clear lens only blue light blcoking around 25%.
C3 grey color polarized clip on. sunglasses clip on.
C4 polarized brown lens clip on for sunglasses also
C5 Orange lens blue light blocking 99.5% blue light.
C6 Red lens can blocking all the blue light.. can make good sleep if wear before you go to bed. but too dark. don't wear more than 2 hours.