Daytime Projectors buying guides
Daytime projectors are for rooms with windows and lights on. Brightness is the main number, so look at lumens, a measure of how much light the projector puts out. Higher numbers fight daylight better. The screen matters too, because ambient light rejecting screens are built to keep the picture punchy in a bright room. Even so, closing curtains still helps.
We haven't published a Daytime Projectors guide yet. We only publish a guide once the research behind it is done.