I have purchased about 15 of these over the recent years. The lights function as they should and provide a sense of security. Unfortunately they do not last long. The lifetime of the motion detector varies from 12 to 24 months. At that point the light either does not come on or stays on 24 hours a day. I then buy a new one and throw the old one away.They come with a 10 year warranty now but when they don't work trying to get a warranty on a 25$ item is a hassle and if you have to send in parts and receipts it really isn't worth it. I have to tell you that I have had 100% failure of every one I have purchased and I am installing a new one today. It can be a hassle to rebuild a new light, remove the old one and if it is high up on the house it is really a pain.I wish the lights just worked or I could find a better and more reliable replacement.