Homes & Gardens on MSN14d
Are lumen ratings fake? This marketing trick could mean you've been missold solar lights
Some lumen ratings are real, but shady practices mean your lights may not be as bright as they are supposed to be ...
The Droid Guy1mon
Understanding the Difference Between Ansi and Lumens for Projectors
This unit is derived from objective readings taken using an illuminance meter. To calculate ANSI Lumens, the projector is placed at a designated distance from a projection screen, and the screen ...