2nd Gen UVC Light Test Card with (WPV) Word Power Visibility Technology

Works very well.

I got this to determine if sunglasses (and other eyewear) actually delivers purported UV protection. The card works great. I merely covered the UV sensitive areas with the lens, and exposed it to sunlight. Quickly remove the sunglasses and check if the area is still white. You have to be quick, because the ambient UV light will affect the sensitive rectangular spaces. I am happy to report that the glasses I tested did indeed have UV protection. Even a pair of reading glasses offered UV protection. (The lens doesn't have to have dark tint to possess UV protection.) I wish the card came with a case/sheath, for protection. Otherwise, it functions exactly as expected. Great assessment tool. 4.75+ stars with a very high level recommendation.

Niche product but it allowed me to determine that I inadvertently bought a counterfeit pair of sunglasses as they did not filter any UV.

N'indique aucun uvc alors que j'ai des tubes désinfectants uvc , produit défectueux ou faux; ne pas acheter. Produit detiné à vérifier l'effet des uvc en professionnel (cabinet dentaire).

Works very well. I just put the card directly under the sun and it turned purpose right away. When i put it on my dashboard, it didn't turn purple that much. However, when I'm inside a store behind the glass window, it also turn purple. At last, I tried it on my sunglasses and it only turn half purple where the part covered by my sunglasses was white. Not sure how reliable is the sensitivity, but from my non-professional test, it works really well! However, it is a bit expensive for what it does on a card.