With so many mobile devices in our daily lives, business professionals find it convenient to project from smartphones, tablets or laptops in meetings. Many streaming users are used to binge watching with smartphones or tablets. However, screen sizes are limited. It’s not only exhausting to for your eyes, details are often overlooked in a glimpse.

You must have heard people saying this bulb is “xW;” the larger this value is, the brighter this bulb will be. The term watt refers to the power of a bulb; the larger the watt value is, the more power this bulb will consume. Lumen is the unit of luminous flux, a measure of the power of light. From the same distance, a higher lumen brings more brightness. On the contrary, with the same lumen, the shorter projection distance is, the brighter the screen will be; a larger screen requires a larger lumen. But you need to be aware that viewing a too bright screen for a long time would damage your eyes.