Trident 10w Pl-C downlights

Made by Trident lighting, I had never seen such unusual fittings before. In my opinion they arent even downlights.
sold as packs of 3, I bought these about 4 years ago, in that time they spent most of it in my shed dismantled as I had used the SS ballast and lamp holders in a home brew fitting of mine. I realise now what a stupid thing that was, and have since put these fittings back together. annoyingly one of the glass covers has been broken, but in situ, you cant tell unless you look, so in a sense, I'm not too bothered. Six 10w PL-C lamps look awesome starting up though, I really wish I had bought more tbh. Annoyingly over time the PL lamps got damaged or misplaced, so need a few lamps to complete them.