KJ Global is calling this the world’s first eco-friendly motion sensing light bulb. I’m no green power expert but I can Google things and pretend, which I did, and based upon my 10 second search I’d say it looks like it’s the only one that has the motion sensor built right into the bulb and not as a bulky add-on. So mazel tov fellas. The tip of the bulb has a motion sensor so the light only goes on when someone is in the room (and moving). The bulb will fit into any standard light socket.
It might get a bit annoying if you’re just sitting there reading and you have to keep waving your arm around to get the light to turn back on, especially if there’s that half second pause before the CFL’s light up and super especially if you’ve got one of these installed in a bathroom. On the other hand, if you’re the type who forgets to turn lights off when they leave the room, now you can actually get some real savings out of that compact fluorescent instead of just leaving it on all the time. The luminance level and lighting duration before shutting off can both be adjusted. The bulb costs about $22 (which is a lot more than a regular CFL bulb) from the European distributor plus shipping, so it’s probably not worth it unless you can find a local place selling it, or a much cheaper price.