LUX are not Lumens
While Vankyo advertises the V630 brightness as 6,500 LUX, the industry standard for measuring brightness is ANSI lumens. This rated brightness of 6,500 LUX might seem like a lot but there is a catch. LUX is not a standard projector measurement so it can’t be used to compare brightness between projectors from different manufacturers. It might be helpful when comparing two “LUX” rated models in Vankyo’s lineup, but it can’t be used to compare brightness with another manufacturer’s projectors, so it is pretty much meaningless number.
To measure ANSI lumens of the Vankyo and Benq, I set both projectors to their brightest modes. I also made sure the projectors were in their highest lamp mode. The Vankyo only has one lamp mode while the Benq has four (Normal, Economic, Smart Eco and LampSave).
I also measured brightest at full wide angle because the iris is wide open allowing the most amount of light to get through. I took 3-4 readings about 15-20% out from the center of the lens. That should give a pretty good approximation of ANSI lumens unless a projector’s brightness rolls off excessively at the edges.
Vankyo V630 Brightness (Vivid Mode, Single Lamp Setting): 423 lumens
BenQ TH585 Brightness (Bright Mode, Normal Lamp Power): 3,885 lumens
Even before I measured the two units, it was obvious that the BenQ was significantly brighter the Vankyo. When tested, the Vankyo V630 produced about 423 Lumens while the BenQ TH585 delivered the 3285 lumens. The BenQ measured nearly 8X brighter than the Vankyo. For the rest of the modes, I measured the Benq at wide angle because the Vankyo is a fixed throw ratio.