The VW70 does leak some light through the lens. In my testing room, I can spot a small amount of light hitting my wall, outside of the projected image area. To do so, though I need an almost perfectly dark scene, and then I have to go looking for it. Because of the VPL-VW70's excellent black levels, the brightness of the stray light is very, very dim, and should not be an issue. Note, however, if you have a white wall around your screen, then you may be able to spot the light leakage, but again, its minor.