ProjectionDesign has a unique solution for high end custom installer. Their Action Model Three 1080 projector, using a single 1080p DLP chip, but is equipped with two lamps and two color wheels. In other words, the projector has two light paths that are recombined before being sent out the lens. ProjectionDesign claims that this eliminates rainbows, and in ten minutes of viewing, I only saw one rainbow that wasn't caused by rapidly turning my head. I'm real sensitive to color rainbows, so I'll have to say they succeeded.