This is a modified version of this thing: https://www.myminifactory.com/object/2-table-lamps-plain-fancy-28155
It is basically the same part as the ribbed lamp but without the internal surfaces and an integrated base. By making the base part of the lamp itself the need for a second part is eliminated and the whole thing prints faster and easier. I also changed the shape of the ribs a bit; they are wider and a bit thinner. The 2 photos show the lamp in daylight with it's light off and in a dark closet with the light on.
The light source is a standard 68mm/2.75" diameter LED "puck" light that is powered by 3 AAA batteries. I bought 3 of these lights at Lowes for $9.98 batteries included.
Here is a link to the puck light: