This CFL was designed
in 1997 in early days of
those bulbs containing
half pipe metalized to
prevent casting light
backward bringing
about 37% improvement
in total efficiency.
Manufacturers were
uninterested in this
advancement even in
case of UV lamps due
to alleged complicate
half metallization.
Anybody interested in
this invention of mine achieved by half
metallization?
It is 3D: click it with
mice to rotate and
roll the middle button
to zoom, press it to
move around.