1) Homeseer floodlight add-on sensor sensor. is kind of ugly but very practical. It’s a Z wave sensor that you add to a dumb floodlight, anything up to 300 W. It includes motion sensor, lux sensor, and temperature sensor. There is a manufacturer-provided edge driver now. So if you’re OK with the aesthetics, it’s one of the least expensive ways to solve this use case.
Edge driver:
[ST EDGE] [RELEASE] Homeseer Devices, manufacturer-provided edge drivers
2) Ring Smart Lighting floodlight (no camera)
Ring has some excellent smartlighting products that work with their ring bridge, based on the old Mr beams models. Lots of community members really like these. There’s no direct integration between smartthings and the non-Camera Models, but they do have a good integration with Alexa routines, so you can use that as an intermediary, with virtual switches as proxies for the ring lights. So it’s more work to set up, and as of now it’s still a cloud to cloud integration, but these are very nice lights and might be worth considering.
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Hopefully, if there are other candidates, other people will post. Those are the two main options I can think of that fit your criteria.
Hue has a very nice elegant, outdoor floodlight, but you would have to have a separate motion sensor. And Arlo has a popular floodlight camera, but I know you said you didn’t want a camera.
We should also mention that if you can wait a few months, there may be more candidates once more companies roll out Matter-compatible devices. That would be a local integration with no custom code required, but we just don’t know what’s going to come on the market yet.