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"the L1 is twice as bright as the ShowWX."

How do you guys figure that? Even if the L1 were capable of 20 lumens (which other reviews and my own use have shown is not the case), it still wouldn't be "twice as bright" as the ShowWX since the human visual response to an increase in lumens is logarithmic, not linear.

I owned both at one point in time (I sold the L1 and kept the ShowWX), and showing the same content side-by-side, the L1 appears only slightly brighter than the ShowWX.

The PK201, by contrast, actually appears to deliver on its 20 lumen output spec, and it is comfortable to view at 100 inches, unlike either the ShowWX or the L1.

If you happen to have both, display a similar sized image from the PK201 and the L1, and see if you think the L1's 20 lumen spec stands up.
BenQ