First, let me say I have changed out outdoor light fixtures several times but I am a do-it-yourselfer, not a pro. I now live in a development that has big spaces between residents, no street lighting or sidewalks and can be VERY dark on a moonless night. My newly constructed home had not included any motion detector lights and I like the idea of them for security. I removed the similar sized standard lights on either side of the overhead garage door and installed these, carefully sealing the connection area as noted in the instructions. I installed some LED vintage look bulbs (Vintage LED Edison Light Bulbs, Dimmable Daylight White 5000K ST64 LED Filament Light Bulbs, 10W, Equivalent 100W, 1100 Lumens High Brightness LED Antique Bulbs, CRI 90+, E26 Medium Base, Pack of 4) I found on Amazon. These are very energy efficient and very bright. The lights have auto on at dusk at 30% brightness and go to 100% when motion is detected for a short time. The detection range is quite far and the lights turn off at dawn. I have purchased several different makes of this type of light over the years and this make and model has been the easiest to install. Good Luck!