Solar Motion Sensor

I want it to be comparable to a large halogen bulb. I want it to turn about half and acre of my yard. Thank you.

Home Depot or Lowes to try ....

For an area that large would try Masters Mc & Grainger online catalogs or industrial electrical supply house for the motion detection devices used on loading docks and parking lots.
Might cost a little money for a very bright light solar if you can find one.
Cordially