The difference between lux and lumens by definition The core difference can be summarized as follows: Lux is a measure of illuminance, the total amount of light that falls on a surface; Lumens is a measure of luminous flux, the total amount of light emitted in all directions. In our graphic below, each yellow dot represents a unit of brightness. Free 2-day shipping. Buy Wi-Fi Mini Projector, 2500 Lux Outdoor Movie Projector Supported 4K 1080P Synchronize Smartphone Screen by Wifi or Cable, 150” Display - Support TV Stick, HDMI, USB, AV, VGA, SD at Walmart.com Bomaker hd tv projector, 3600 lux led hdmi projector with carrying bag, 1080p and 250" display supported, compatible with tv stick, ps4, hdmi, vga, tf, av and The best way to do that is to project the ur movies onto a massive screen on the wall Well, thanks to LESHP projector, With 3200 lumens...Lumens: A unit of measurement of the amount of brightness that comes from a light source. The standard lumen rating of a data projector is the average of photometer readings at several points on a full white image on the screen.