lumens are worthless.
So now you need four engineering degrees to buy a light bulb?
That's why sometimes people can be too smart for their own good.
You should not need 4 degrees. But to be certain that what your buying will do what it says on the tin you do need to know a thing or two because the marketing wank has been allowed to get into specs and governments don't care to legislate on what can be sold and what it can be called.
Lumen's are far more useful than watts. Maybe in the days of only incandescents watts was enough but ever since the existence of fluorescents it has lost it's usefulness. But the general public and legilation are always years if not decades behind a technology.
Lumen's describes actual light output, watts does not, so it's a much better measure. You will need to add to that colour temperature at the very least.
Of course if you don't want to have to think for yourself you can demand that your government carries out checks and controls on all imports and manufacturing as used to be the case.
People so love to blame and criticise new ideas and technologies when in actual fact the problem is that all manufacturers and retailers care about is their profits and they actively don't care about quality and standards.
There is no point in shooting the messenger! What you need 4 degrees for is to reverse engineer the marketing bollocks wank advertising and outright lies.