Juhani states: October 26, 2015 at 3:28 am The condition is that you have to get the many light to 1cm x 1cm space. I've 100W led (8k lm) but I get far more light to display from single 1k lm Cree XM-L2. 2nd difficulty is the slender wavelength sample of any led. The colour wheel in DLP projector dimms the light more.The Epson H799A projector lamp