Where do you place the meter? Obviously, closer to the projector will get you higher readings.....

Any thoughts?

If you have a light meter that reads lux, then place right at the screen facing the lens projecting a 100 IRE (full white) window.

(lux/10.76) x sq. feet of the screen = lumens
(lumens/sq. feet of the screen) x screen gain = Foot Lamberts

I have a GM I1 pro sensor..

Thanks,

I have a GM I1 pro sensor..

Thanks,

I1Pro - i believe is not a Light Meter...its a spectrometer

I1Pro - i believe is not a Light Meter...its a spectrometer

That's correct... But can i not be used to measure light output?

That's correct... But can i not be used to measure light output?
It can, though mine doesn't necessarily track my dedicated light meter for measuring light. Basically, use the Y measure as your measure for light output. Also, if you know your screen size in square meters, you can eliminate Tom's conversion (divide by 10.76) to square feet (lux = lumens per square meter).

Bill

Is there a rule of thumb for Lux. A minimal level? or moderate level? I am working on my projector placement (AE700) and currently at 300 lux.