Larry,I've installed many as part of fire-suppression systems, and never seen a ceiling-specific model. But then, I've never needed to install one on a ceiling.
This would be in any instructions that come with the units. Unless one says wall-mount only, I'd use one on a ceiling, oriented for best dispersion..
Some models are dual listed. Siemens has (or had) one or two, but I can't recall the model numbers.Every manufacturer makes ceiling and wall specific appliances. The lenses have different characteristics for wall and ceiling and they are not listed or intended to mounted in the incorrect location.
Also certain models have a higher current draw for the ceiling because it takes more power to get the same candela rating distributed 360 degrees.