But what I find the worst these days are ultra-bright large LED screens. At night they are blindingly bright. One in particular in my area installed at a shopping plaza, is so bright I need to look away when walking by. Its "ad light" floods the whole area.
There is literally a billboard on the highway in British Columbia that is a pair of skidmarks descending into a valley with large font that says "KEEP YOUR EYES ON THE ROAD". During the night this sign is lit like a christmas tree, very bright.
I could never get over how difficult it was to ignore that stupid billboard every time I crossed it.