Is 70 watts bright enough for a driveway?

70 watts of LED is roughly comparable to a 500-watt halogen floodlight, which is plenty for a driveway or large porch. For a small entryway it may be brighter than you need.

Does it need a neutral wire or a switch?

Motion sensor lights usually wire into existing live and neutral lines and work without a wall switch. Have an electrician confirm your wiring before installing.

The listing does not state an IP rating. Outdoor security lights should be at least IP44; ask the seller for the rating before mounting it in exposed rain.

How far does the motion sensor reach?

Detection range is not listed. Typical PIR sensors on this type of light cover 20 to 40 feet with a 120- to 180-degree field; confirm the figure before buying.

Outdoor lighting tends to drop in price in early spring and around Black Friday. Set a price alert and compare across stores rather than buying at first sight.