Integrating sphere

Now the nights are drawing in, it’s time to play with the integrating sphere.
Folomov Tour B4: claimed output 1200 Lumens, actual output 1094 Lumens. Not bad.

That looks like a nice one. Please give us some details.

The sphere or the flashlight?

Well I am interested in the sphere but I am sure some are interested in the light.

I would also be interested in knowing more about your test setup.