Rock Lamp

This is designed such that once it finishes printing a specific bulb holder can be screwed directly onto the base with no problems:

This is the actual one I bought, though it now seems to be unavailable.
https://www.amazon.com/gp/product/B00OZRF798/

These look like the same thing, please let me know if they are:
https://www.amazon.com/dp/B01GU7R2J8/ref=dp_cerb_2
https://www.amazon.com/Feet-Long-White-Ceiling-Pendant/dp/B00J9TILJA

Any sort of bulb should do, pick one that gives the de