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An important note about photochromic lenses:
Because they react to UV light and not to visible light, there are circumstances under which the darkening will not occur. Frist example, is in your car. Because the windshield blocks out most UV light, photochromic lenses will not darken. Second,is indoors test with ordinary lighting(Because the lighting used in daily lighting does not contain ultraviolet light),photochromic lenses will not darken.
So the ways to activate photochromism is:
Exposed to UV rays, as in direct sunlight OR Use ultraviolet light lamp (not ordinary lighting lamp).This is the way to activate the photochromic function of the product.
Brand Name: LIOUMO
Department Name: Adult
Frame Material: Alloy
Lenses Optical Attribute: Polarized
Lenses Optical Attribute: Photochromic
Lenses Optical Attribute: UV400
Eyewear Type: Sunglasses
Lens Height: 42mm
Lenses Material: Polycarbonate
Model Number: AL2458BS
Item Type: Eyewear
Lens Width: 62mm
Usage Scope: Driving,Fishing,Travel,Outdoor,Sports
Suitable For Face: Round Face Long Face Square Face Oval Face
Package: Box,Clean cloth,Card,glasses
Frame Feature: Stylish Comfortable And Not Easily Scratches
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