Not all brightness claims are equal. You’ll often see lumens mentioned when choosing a projector—but what does it really mean? Lumens measure the total visible light a projector emits. Unlike lux, which focuses on intensity in one area, lumens give a consistent, full-picture view of real-world brightness. The catch? Not all brands measure brightness the same way—some inflate their lumens' numbers or use non-standard methods that can overstate performance. Epson’s True Lumens measures both white