This is very difficult to do for a LED that is already made into a pill. Even if we can take the reflector off the bare LED would have to be held up very carefully at the entry port of the sphere without any blockage from the flashlight host. I would have to clip leads to it from a power supply source. The host would get in the way if the reflector is not there to angle all the light into the port. I don't have a mount made for a LED module that is already made into a spring loaded drop in pill.
It would be a very interesting test. However, each reflector type would have to be tested separately. The smooth, orange peels, different shapes like for the Dereelight and Raidfire Spear throwers, not the same as the little ones in the D26 size pills. Could not assume one constant for all reflectors.
The only light I had that lent itself to do that was the maglight. With the head and reflector off and the bare LED could be shown directly into the entry port of the sphere just enough to get a peak reading while still attached to the main body of the light that I could hang on to.
After the Christmas holiday break I will look into getting this done.
Also once we get WBP's system fully calibrated and giving us good readings, we might be able to get more testing like this done. We are very close and he has some exciting data collected so far.
It will be interesting to see how much of the color spectrum gets lost by the reflector and glass windows as well (if any???).