Originally Posted by davorn34
It has 3400 lumens but im going to use it in eco mode which might help
The closest 4K shifting Optoma I could find a professional review for with a similar brightness output and 240watt p-vip lamp is the UHD60.
The following quotes are about this UHD60, but they're VERY common for many projectors.
"The Optoma UHD is rated at 3000 lumens. However, its Bright mode, which puts out close to 3000 lumens on our test sample, is overtly green in tint and for the most part useless for video presentation unless you don't mind a greenish picture. The remaining preset modes are not as bright but they give you much better color fidelity."
The rest of its presets (the ones that aren't overtly green-tinted) measured closer to 1500lm or less.
"In Reference mode, color brightness is 100% of white. On the other hand, in the modes where Brilliant Color defaults to its maximum of 10, color brightness is 55% of white"
The Reference mode with full color-brightness measured around 500lm while the brightest non-green settings fell to 800lm or less at full color-brightness on FullLamp.
EcoLamp cut brightness by more than 1/3, dropping the projectors full-color brightness in non-green settings to around 300lm-500lm.
By increasing the peak-white brightness you can often push these numbers up by 1.3X-1.5X (around 400lm-700lm) while keeping a lot of less colorfull/vivid content looking pretty normal, but colors will never reach past 300-500lm in EcoLamp (or full lamp after enough use has caused the lamp to naturally dim over time).
In short, don't expect 3400lm in any preset you'd actually want to watch...this is the number that manufacturers publish to attract attention, but in practice it's more for projecting Black&White spreadsheets in a lit office or school. In a hometheater or gaming setup where you'd like white to look white and colors to look bright/vivid expect to keep closer to 500-800lm on the screen..first starting in EcoLamp and eventually switching to FullLamp when Eco becomes too dim with age.