The cheap bunch of LED stickers that I bought 3 years ago has been so good with this. They were sold as "6mm Round 10 Colour Dot Sticker Circle Sticky Self Adhe

The cheap bunch of LED stickers that I bought 3 years ago has been so good with this. They were sold as "6mm Round 10 Colour Dot Sticker Circle Sticky Self Adhesive Label" on ebay. LEDs on the electric toothbrush shining brigher than a thousand suns? Put stickers on them. LEDs on the dog water fountain illuminating the whole living room at night? Put stickers on them. The funny thing is that the LEDs are so bright that they still shine through the stickers. Except that now it's at the brightness level they should have had in the first place.