I just bought an LED PIR floodlight which has the following instructions:
**************** Schedule radar inductive device description.Radar induction voted light lamp induction device (3G following) using more general Le effect principle, independant development plane antenna launches received circuit, intelligent detection around electromagnetic environment, automatically adjustment work state, industry first radar induction voted light lamp induction device products features:
- Work way: induction switch connected Hou, in delay time paragraph within, as has mobile objects, switch will continued connected, until people left and extended time.
- The photo control built-in: the light intensity according to the outside world, to control whether the switch in order to save energy.
- And infrared products compared: radar switch induction distance more far, angle, wide, no died district, can penetrating glass, and thin wood.
It is a good device though, 70W power in measured by me, with a 95% PF. Quoted 100W for some reason. Quoted 8000 lumens out, appears about right comparing to halogen bulbs. 8.8 times more efficient than an incandescent, which is reasonable for an LED I guess. I've seen up to 11.5x, but that's probably without any diffusers etc. And it is distance more far, angle wide, no died district, just like it says.