How Much Ambient Lighting Do You Have? - Quick Screen Material Calculator
How much ambient lighting do you have?
Complete light control (dedicated theater) to mild ambient lighting
To judge this, if you were to read a newspaper in your theater, the words would be difficult to impossible to read. This could possibly mean that the lights are completely off or there are dimmed lights or even background lighting.
Mild to medium ambient lighting.
To judge this, if you were to read a newspaper in your theater, the words would be difficult to read, but not impossible. This could possibly mean that there is light on or you have daylight spilling in while you're using your projector.
Medium to extreme ambient lighting.
To judge this, if you were to read a newspaper in your theater, the words would be comfortably read with no difficulty. This could possibly mean that the lights are on full power or there is a considerable amount of daylight coming in through something like a glass door or wall.