Does it really turn on at dusk and off at dawn?

Yes. The photocell handles dusk-to-dawn switching, and the motion sensor overrides it to full brightness when someone passes. Most owners run it fully automatic and never touch a switch.

Can I adjust how long the light stays on after motion?

Some versions have a small dial for hold time and sensitivity; check the model you are buying. If yours has no dial, the hold time is fixed at the factory setting.

Is it bright enough for a driveway?

It is a wall lantern, not a floodlight. It lights a doorway or a few feet of path well; for a long driveway, use two or step up to a higher-lumen fixture.

Does it need special wiring?

It wires into standard outdoor mains wiring like any wall lantern, so an existing fixture can usually be swapped directly. If there is no outdoor circuit, an electrician is needed.

Will it hold up in rain and snow?

The IP65 rating covers rain, dust and splashes, and the aluminum housing resists rust. It is not rated for full submersion or for salt-heavy coastal air over many years.