Nice info!I was using a large M&R Tri-Light before the light speed. I cut the power on the 6kW unit in half and my exposure was about 20 sec. I found this gave me better control then full power, which would expose the screen in under 7 sec. Now on the light speed, my exposure is 19 sec. For one or two screens, the light speed is faster only because there is no warm up time.