taggit Summary
You can always double them up to completely block out the light source if you'd like (many reviewers do this) or buy the stronger **full black-out** edition!I own a digital clock with the numbers displayed in red LED light, and every night I've blocked the light with a cover so it doesn't shine in my eyes as I sleep. For the first night EVER I didn't have to cover the clock display before I went to bed!!Some commenters argue you could get the same effect using electrical tape, regular tape covered in Sharpie, etc., but true to the name of these products if you're looking for something to DIM, then this is for you.