Can I use a mini projector outdoors?

At night, yes. During daytime, even 500-lumen projectors wash out in sunlight. For outdoor movie nights, wait until after sunset and use a white sheet or portable screen.

What screen size can a mini projector achieve?

Most mini projectors produce 40-120 inch images depending on distance. Place 6-10 feet from the wall for 80-100 inch image. Too close is dim; too far loses sharpness.

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