...the current issue of The Perfect Vision magazine has a review of the Sim2 HT500 Link 3-chip pj. They measured an amazing 39.5 ft-L of light output, with the contrast adjusted below white crush levels, from a pj using only a 250W UHL lamp. I hadn't realized higher lumens came with this design. Is the reason the 3-chippers are able to output more light to do with the fact that there is triple the amount of reflecting surface being bathed by the lamp, and each panel is "on" all the time, as opposed to a single panel on shared time as with a single panel machine? What a difference!