UPDATED to 5 stars
This would often work as intended – great! Just as often, it would turn the light on when motion is detected, then simply not turn off – totally defeats the purpose. This ‘not turning off’ problem seemed worse when using a CFL, despite the fact that the item description says it is compatible with CFLs.After just under a year, it ceased functioning altogether. It has a 5-year warranty, so I guess I’ll ship it back to them. Maybe the replacement will work properly. I’ll update.UPDATE 12/06/12: manufacturer shipped a new one. This one works perfectly. Hopefully the first one was a fluke. Based on this, I upgraded my rating from one star to three.UPDATE 02/10/14: Based on the great performance of the warranty replacement that was sent to me, I bought another for a hall closet. Works perfectly. Maybe the first one was a fluke. Nevertheless, based on the two that I have now, I upgraded my rating from three stars to five.Highly recommended.UPDATE 01/14/14: The one I purchased for the hall closet ceased functioning altogether after less than a year. Based on my experiences, I would say that this item is very unreliable. It’s a good thing that it has a 5-year warranty. I shipped it back to the manufacturer – again on my dime. After an extended period of time, the manufacturer shipped a new one. Again, this one works perfectly. Based on this second failure, I am downgrading my rating from five stars to one.If you are looking for a motion sensor that works perfectly – until it soon doesn’t – then this is for you. If you are looking to not have to go through the trouble of installing a new one every year or two, move on to something else. I just wish I knew what the alternatives are, so I can purchase those after the warranty period runs out on these.

Very sensitive; limited sensor positioning.
Like many motion sensor sockets, this model relies on a spring-loaded pin at the center of the socket-base — the part that screws into the lightbulb socket. This pin allows the unit to be unscrewed a little, to reposition the sensor housing. The housing itself extends from a limited-movement ball socket so you can rotate and tilt it a little in any direction. The result — unscrewing the unit from the wall or ceiling socket where it’s mounted, and swiveling or tilting the sensor a little — is that you have a decent chance of “aiming” the sensor in the required direction. (Some reviewers apparently didn’t notice the spring-loaded pin feature.)I was able to get it all positioned so it triggers when I enter the store-room where it’s mounted. But with a big LED multi-panel light dangling from it, I’m not really happy that I can’t screw the unit fully into the ceiling socket. Using the “unscrew a little” solution for positioning the sensor leaves the unit less than fully fixed to the ceiling socket.One would think that by now, with hundreds of schemes for making motion-sensor sockets, there would be a more complete and robust scheme for positioning the sensor. I installed this unit to replace a concentric sensor socket that seemed to have a 360 degree field of view, but was unable to detect motion 90% of the time. This Westek unit is very sensitive, and works 100% of the time. Unfortunately, it has no adjustments for sensitivity, ambient light, or on-time. It ignores ambient light (which is not a problem in my windowless storeroom), is very sensitive to all motion (which is what I needed), and stays on for 10 minutes with no adjustment to change duration (which is OK, but I would rather have it time out after 1-2 minutes, since it re-triggers at the slightest movement).

I purchased this light motion sensor for inside of my garage. It does what it advertises… turns on a light when motion is detected.Here are some of the “finer” details I learned after purchasing it that was not made in the description…* The motion sensor can be tilted up or down (up to 20 degrees in either direction), and rotated left or right (up to 90 degrees in either direction)* Light will stay on for 10 minutes* Sensor will not turn the light on if it senses enough natural light already (probably an issue if you’re thinking of using 2 of these units in the same area)In my situation, I wanted to use it on the celing of my garage. In order to move the sensor beyond the 20 degree range (so I could properly point it at a door I use to enter the garage), I had to use a hack saw to cut a part of the trim the sensor uses to connect to the main part of the unit. This is the only reason why I’m not giving this device a 5/5 rating.

More designed for horizontal figure but otherwise works as expected

Does not work if weather is minus 10 or below.