These are smaller than I pictured (i didn’t get out my ruler when i read the dimensions). And the big mouth part is held on by a screw on disk/nut thing, which is expected, but it screws onto a ceramic neck! Which is a problem b/c the neck can chip, as mine did, which then makes it impossible to screw on the plate, and therefore would make the light not have a bulb cover.  I gave this light 4 stars b/c this almost happened to me, but i was very gentle and avoided the issue.... however i can never unscrew the plate again.... not that i needed to.