I designed two new versions of the caps from the Philips Hue Bulbs because the original cap with 60mm in diameter was too big to fit through the hole of the globe I wanted to put the bulb in.
My versions are smaller in diameter, one with 54mm and the other with 51.5mm.

I suggest to use transparent filament but white filament should be good too.
Printing the "dome" without support works quite good, so print the cap with the open hole on the heat bed and support only underneath the outer overhang.

For reattach the cap to the bulb you can use silicone to glue in the cap.

Anycubic

All-metal Mega

Doesn't Matter

Yes

0.08

100

Nozzle 0.4mm