These were a good find, especially for the price they were up for! It's interesting yours is dated 2011 while mine is from 2007, I guess they must have been ordered at different times by whoever they were originally for.

They absolutely were The ballast in mine has a good volume to it

A slim chance of coming across any more too, especially NOS! Is yours fitted with Tridonic gear too?

Never a very common lantern as it wasn't made by an actual lantern company. Yes it is Tridonic gear

Local fire station had one of these out front. Long since replaced by a crappy little LED floodlight (that has failed)