Deciding between an outdoor projector and an indoor projector is a straightforward choice. Outdoor projectors are designed for mass broadcasts outside an enclosure, while indoor projectors are designed for entertainment, business, or educational purposes in an enclosed area. Outdoor projectors have larger screens and much higher lumens ratings than indoor projectors because they are exposed to ambient light hence the need to counter natural light with extreme brightness. You need an outdoor projector if you stream content to a larger audience in the open air.