Juhani suggests: October 26, 2015 at 3:28 am The condition is that you have to get all of the light to 1cm x 1cm location. I've 100W led (8k lm) but I get much more light to display from one 1k lm Cree XM-L2. 2nd challenge may be the narrow wavelength pattern of any led. The colour wheel in DLP projector dimms the light all the more.An first replac… Read More