How bright is it compared with a halogen flood?

At 7,000 lumens it matches or beats a 300W-class halogen while using far less power. It is bright enough for a driveway or large yard.

What are the four modes?

Auto turns on with motion, dusk-to-dawn stays on from evening to morning, on-time keeps it lit by switch, and the fourth is a setup/test mode. The lux dial is best set around halfway.

How far does the motion sensor reach?

Up to 72 ft at a 180° angle. That covers most driveways and side yards from one corner mount.

Does it need special wiring?

It is a hardwired fixture, so it needs an existing outdoor junction box or a licensed electrician. It is not a plug-in unit.

Will it stay bright over time?

SANSI claims about 90% brightness after two years thanks to its ceramic heat control. Independent long-term tests are limited, so treat that as a manufacturer claim.