They are the Ducati Scrambler brand engine bars (part # 96780831A). I don't know how effective the protection is but I like the look so much better than frame sliders. Also, I got them with the thought of mounting some lights.
Exactly why I like the look of them. I want to mount some extra lights to mine too.
Useful for mounting small bits of heavy luggage I'm sure too. In adventure mode, I'd rather mount tools and water towards the centre of the bike than out back.