They dim 50-80% of the light so you can still tell that your devices are actually *on* and functioning. You can always double up to completely block out the light source if you want (many reviewers do this), or buy the stronger **full blackout version**!
Promising review: “This is the best thing you never knew you needed. I own a digital clock that has red LED lights showing the numbers and every night I cover the light with a cover so it doesn’t shine in my eyes while I sleep. I know it’s silly but I like my room to be pitch black and cave-like. On a whim I bought this product. OH MY GOD! This was a game changer!! For the first time ever I didn’t have to cover the watch screen before going to sleep!! I had no idea what a big difference this little dimmer could make, but I am more than happy with the result. I can still see the time display just fine, but now my room is a happy cave! Some commenters argue that you could get the same effect with electrical tape, regular tape covered in a felt tip pen, etc., but true to the name of these products, if you are looking for something to dim, this is the one for you. Plus, the product is easy to remove and leaves no sticky residue at allwhich can’t be said for most bands. I did notice a slight delay in response when covering my TV’s LED sensor, so if you’re trying to block something that actually captures input, I might not recommend this. Other than that, excellent product!” – Amazon Customer
Get a sheet of over 100 dimming stickers (in various sizes and shapes) on Amazon for $4.39.
