This design light has the form of a sphere, but projects squares on the table. When the light is off you do not expect this. Some math is used to calculate the projection. The light is fully customizable to your needs via the customize button.
For the light source a power LED can be used that can be mounted on a flat service. Like this one for example. Use correct power source and recommended to not use the LED at 100% because of heat disipation.
Size of the sphere and projection can be changed. Take into account that if you make the projection to large compared to sphere you get to much overhang or even imposible design to print.
If there are any questions or recommendations let me know.