Fig.16 - 501OL Disc and Sphere Subtraction wall light in color (2019)
Fig.17 - 501OL Disc and Sphere Addition wall light in black (2019)
In the Disc and Sphere Subtraction
(fig. 16), smaller circles are subtracted from the
circumference of the main disc.
The Disc and Sphere Addition (fig. 17 )
overlaps smaller circles onto the main disc.
In the Disc and Sphere Intersecting Tubes
(fig. 18), two tubes intersect the surface of the
main disc.
