I bought this for obvious reasons. Given that Corona stays longer in cardboard boxes, I had to spray the box first before taking this light out. The UV glass was filmsy and I was not sure who handled it and when. I used the glass a little bit away from my eyes and check some surfaces for a minute or two. That was last night. Today morning, I woke up and found myself having difficulties even reading letters on computer screen.I have cleaned my glasses and eyes several times with little improvement. I am worried and stopped using this product for the fear of eye problems.