A lot OTT in my opinion. More money than sense.
Although I used put a LED collar on Max when we went for a walk after dark.
Don't now. I may lose sight of him - he's mostly black - but he knows where I am and where we live.
Our older dog hates wearing anything but his harness so we don't dress him. The younger one doesn't like hats, so we don't make him wear one but he does have a dozen little tshirts that he wears and it doesn't seem to bother him.