This will require existing (or new) wiring, and technically should be installed by a professional electrician, but comes with very good DIY instructions. It's a good option to replace existing floodlights. The bulbs are non replaceable LED, I expect them to last for the life of the unit. Light output is good, not as strong as high powered floodlights but I prefer these. Motion detection is excellent and the zones are very configurable. So you could light up when someone uses stairs, but not when your dog is wandering around your yard. Because it uses house power, it will be subject to power outages, and you need to keep the light switch on for it to work as a security camera. So it's probably worth using in conjunction with a battery powered unit to provide some backup.