Lux vs Lumens on projectors

[timbo343]

We have been going around all the projectors at our place with a light meter and measuring the lux and getting the lumens by calculating the M2 of the area of the projected image.

 

The majority of our projected images are about 1.3m x 1.1m.

 

The lux of a few of our projectors which i want to replace is 80, 70, 97, 105, 84.

Transfering these values to Lumens is 77, 93, 148, 165, 180.

 

I am asking what the projected lumens should be. Bear in mind that some of our newer projectors are:

 

Lux - Lumens

650 - 1023

970 - 1170

690 - 1242

 

Obviously the higher the lumens that a projector states the better the image but ive been asked to do an audit on our projectors and i would like a minimum of what the projected lumens should be.

 

Can anyone help?

 

Thanks