Yeh John it went on. It hasn't moved. I have a fair few bump stops on my way out of my area, so if they haven't shaken it down yet, nothing will... Looks good.
For a 32" bar from 4Wd Supa centre it's very bright and quality seems ok. How long will it last? Time will tell.
Phil @PeeBee opened my eyes on how different LED's / bars react to different voltages. He has some of his running at 30V and output is apparently very good.
I'll toy around with some regulators and step up converters as I have some laying around.