Is the PT-VMZ6ST bright enough for a lit classroom?

Yes. Its 6,200 lumens is high for a short-throw LCD unit, so it stays readable with lights on or blinds partly open. Very bright rooms still benefit from a matte screen.

How large an image can it throw from close up?

With the 0.8:1 throw ratio it produces roughly a 70- to 300-inch image depending on distance. That lets it sit near the wall instead of at the back of the room.

Does the laser light source need lamp replacements?

No. The laser is rated for 24,000 hours in ECO mode, so it runs far longer than a lamp before service. Brightness gradually declines over that life.

Can I project wirelessly from a laptop or phone?

Not natively. The projector has no built-in Wi-Fi or Bluetooth, so you need a wired HDMI connection or an optional wireless module.

What connections and audio does it offer?

It has HDMI and standard video inputs plus a mini-jack audio output and a built-in mono speaker. For room-filling sound, route audio to an external system.

Is it suitable for a ceiling mount?

Yes. It is ceiling-mountable and the vertical +50% and horizontal ±20% lens shift help align the image after mounting. Its 18.3 lbs weight needs a mount rated for it.