Juhani states: October 26, 2015 at three:28 am The problem is that you should get every one of the light to 1cm x 1cm location. I've 100W led (8k lm) but I get additional light to display from single 1k lm Cree XM-L2. 2nd difficulty is the slender wavelength pattern of any led. The colour wheel in DLP projector dimms the light even more.With the la