Juhani states: October 26, 2015 at three:28 am The problem is you must get all of the light to 1cm x 1cm location. I have 100W led (8k lm) but I get additional light to monitor from solitary 1k lm Cree XM-L2. Next dilemma is definitely the slender wavelength sample of any led. The color wheel in DLP projector dimms the light a lot more.An original