The gain values of those mixes haven't been measured yet. Mech should be doing them soon.I was playing with the calc at ProjectorCentral and it estimates that I get 13fl at 124" with a Screen Gain of 1.0. But what is the gain for scorpion painted on a wall? I saw the link in mech's sig but could not find Scorpion or Cream & Sugar in the list.
BTW, the minimum fL. numbers we state for mixes uses the default 1.0 gain value at PJC. At least that's the way I do it.
My understanding is that they are for the default mode of the PJ, which most of the time is high or normal. A few PJ's actually default to low or econo mode. I believe they also under-value the fL. number by 25% to account for some lamp aging, but I may have misunderstood that.Also, do the screen gain numbers on PC assume the lamp is in high mode? I am running mine in low, so what would be the typical impact of this?
As a very rough guide, I would take off 25% from high mode for using econo mode.
I know most people are on a shoe-string budget, but it really helps to actually have a light meter to take accurate illumination readings of your PJ; then there is no guessing or assuming involved. An inexpensive Lux meter is all that is needed. I got mine for something like $35 at Amazon.com. These are not photographic light meters, they are more sensitive that those (and cheaper!). They do a great job of measuring the light output of flashlights too. I mean who doesn't want to know exactly how bright their flashlight is right? :rofl: Being more serious, such a meter will let you monitor just how much brightness you PJ lamp loses through use. It will also allow you to measure the real Contrast Ratio of your PJ.