The Arlo Security Lights do not work directly with Smartthings, but I believe that they work well on their own without requiring Arlo base stations or cameras. They come with a bridge that connects to your wifi and then communicates to the lights with a plug in hub using bluetooth. They turn on with motion detection, and with the latest firmware, they have a dusk to dawn feature. You will have to set up an Arlo account to use them but there are no fees. I have six of them and love them. Plus they have been on sale on Amazon and elsewhere for about 50% off.
Brian