I would like to know how many lumen projectors can use the obsidian UST ALR screen on VIVIDSTORM?

[sai]

I would like to know how many lumen projectors can use the obsidian UST ALR screen on VIVIDSTORM?
I saw on VIVIDSTORM's website that a projector with at least 2000asin lumens is required to use their long focus ALR screen. But it doesn't say how many lumens does the ultra short focus laser projector need?

 

[Joseph Brown]

Same question as I asked before. Their staff said that UST projectors are best used with UST screens, and those with low lumens should choose white screens, but they are not resistant to light.

 

[Danieladbidh]

If you look hard enough, you'll see that it's noted. “Protect eyesight-Real lumen of 1800ANSI or more”.