I've used all sorts and configurations of motion sensor lights and never was totally happy with anything until my big sis got me a few "Mr. Beams" for my birthday last year. These things are awesome. Very bright, adjustable beam, D-batteries but they last a looong time on a set. No solar panel, no wires or conduit to mess with. I only wish the ones I have had the adjustable "time on" option. They turn off after about 15 seconds of no motion. Other than that they're near perfection. Good luck to you on your search.
"I have no idea what WW-III will be fought with, but WW-IV will be fought with sticks and stones."