Three years back I picked up 3 of the 36 LED solar security lights for $13.00 each a bit doubtful on the quality but in there fourth summer they are going strong. Not a bright halogen light but they kick in with movement with enough light to see larger animals and humans and let humans know they have alerted someone. They last until sun up in the summer in the winter a bit shorter to about 4-5 am both depend on how may times they are tripped. Last year I picked up one of these brighter 60 LEDs with longer battery time and with the sensor you can adjust where it trips. Bottom line they work well don't run up my electric bill and let intruders know that someone lives here and puts some level of doubt in their mind if they have been spotted by a human or security system and if they want to proceed further..