Hello there. I have had this lamp for almost a year now. It is a very old circular glass fluorescent light fixture dating back to 1962. The ballast has seemingly been replaced. However it has a very unusual style of bulb. It has a 65w/80w circular lamp with two separate G13 bases instead of a typical G10q base. It is also T12 in width which is very unusual. I’ve never seen this sort of lamp before and I can’t find any information about it. If anyone has any information about this lamp please let me know as it would be very helpful.
Awesome find! I have been looking for one of those for years and years now! theres a few collectors who have examples, but I have never been able to find one sadly
https://www.lighting-gallery.net/gallery/displayimage.php?pos=-76898https://www.lighting-gallery.net/gallery/displayimage.php?pos=-173575https://www.lighting-gallery.net/gallery/displayimage.php?pos=-183835there is sadly not much information out there about them exactly, the earliest examples had Bayonet end caps but most have bipin caps like yours, I was told many many years ago that the coal-board used these tubes in some application or another, but I have nothing to substantiate that, they are in general quite the mysterious tube
the company Bright Light Lamps or Long Lamps (not sure if they where 1 and the same or 2 separate companies) specialised in making custom/weird fluorescent tubes
https://www.lighting-gallery.net/gallery/displayimage.php?pos=-204487they also made another famous but just as mysterious "W" tube
https://www.lighting-gallery.net/gallery/displayimage.php?pos=-137103