![]() Vankyo's V630 model, for example, is an LED projector promoted on Amazon as having "6800 LUX high brightness," while ANSI brightness measurements conducted by a third-party reviewer has shown it to produce only about 420 lumens. Above, Vankyo's V630 is advertised on Amazon as having "6800 lux" brightness, but independent measurements suggest it delivers less than 500 ANSI lumens. ![]() ![]() Vankyo is among four brands being sued by Epson for citing brightness measurements in lux rather than the industry standard ISO or ANSI lumens. By definition, lumen measurements take screen size into account, while a lux measurement is merely a brightness reading from a luminance meter that varies with distance from the source and cannot be used by consumers to compare projectors or calculate the brightness of the image they will see on their screen. ![]() Vankyo, along with WiMiUS, GooDee, and Bomaker, are accused in the actions of using the term "lux" to describe brightness instead of lumens, which are measured and reported by most manufacturers according to the accepted ANSI or similar ISO 21118 standards. Epson has reprised its role as projection industry watchdog in lawsuits filed this week against four budget projector brands sold on Amazon, including the popular Vankyo brand, for their failure to use industry-standard brightness specifications in promoting their products. ![]()
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