Ken, I assume you mean security detector lights. If so, power consumption is immaterial, since they don't stay on very long. You may remember Frank Zachar on Vagabond Tiger. Frank founded the Caribbean Safety and Security net, and he worked up years of incidents in a big data base. His analysis was that the sovereign response to invaders was not guns, but a solid
Son et Lumi?re show,
loud and
bright.
I had exterior motion detector lights for many years. After only one night in a harbor everyone learned to give my boat a broad berth — who knew what canons lay arrayed behind the glare? I use them today high up under the eaves on the corners of the house.
After 20 years of experimentation with different brands, I found that the only ones that worked reliably were (surprise!) the Chinese Heath/Zenith brand. Maybe it's less sophisticated chip technology, who knows? But every other brand either burned out their cards when there was a spike, or they went on and off or into flood mode when the inverter kicked in or out. PriceSmart has them for $1795 apiece.
If you mean lights for stumbling around the house in the dark, see "Light Angel" LEDs at
Amazon.com: Light Angel: Home Improvement