Have some new numbers and some photos of my "experiment" comparing the 900 to the 333 with my new light meter.
I set up both PJ at 15' back from a 1.5 Gain 106" image and just swapped out the cables changing nothing else.
Here is the raw data.
Room with nothing on but light meter *soft glow on screen give the only light I believe which is what is recorded - this is very dark *
Darkened Room = 0.01 Lux
Room with light on which consisits of 2 x 100 watt bulbs in standard light housing - about 10' away from light meter
Lights on in room = 67 Lux
Panasonic with Xbox live main screen - light meter on the select button - see photos to be posted later -
Select button Pansonic 900 (587 hrs on bulb) = 77 lux
Select button Infocus 333 (9 hours on bulb) = 211 lux
Full white xbox screen
900 = 97 Lux
333 = 455 lux
Blanks screens on 333 (don't know how to do this on the 900 to compare as they don't have it in the menu and I don't have a DVD or PC hooked up to it to duplicate same screens as in the 333 menu)
Black screen = 0 lux
Blue screen = 24 lux
White Screen = 666 lux
These machines are not calibrated or ISF certified but these are the numbers untweaked out of the box so to speak. The Panasonic also has almost 600 hours on the bulb so it's lumens have dropped off (lamp measurements above all have been done in high mode)
The meter is an AEMC CA813 meter measurments are in lux.
I measured the light output at the screen, facing toward the projector lens.
My Math -
My screen is a 92" X 52" which translates to 4784 square inches
4784 square inch = 33.222 square foot.
33.222 square foot = 3.086 square meter
Since 1 lux = 1 lumen / sq. meter, we can apply these numbers to the figures above.
Full white xbox screen
Panasnic 900 = 97 Lux X 3.086 = 299.342 Lumens
Infocus 333 = 455 lux X 3.086 = 1404.13 Lumens
Now one step further for the 900
Figuring that ftL = lumens * screen gain / sq. ft. of screen, then 299.342* 1.5 / 33.222 = 13.516ftL.
Now one step further for the 333
Figuring that ftL = lumens * screen gain / sq. ft. of screen, then 1404.13* 1.5 / 33.222 =63.397 ftL.
You can do the other calculations with just by pluging in the numbers from the different settings above but I was looking for a near maximums on a bright white screen.
I'll post some photos up later - time to take the wife shopping as she put up with me playing downstairs all day with the light meter.
more to come.