Some text for two unusual lamps of their kind.
I found these lamps in the lamp catalog of the British company A.E.I. from 1956.
![](https://www.lighting-gallery.net/proxy.php?request=http%3A%2F%2Fwww.bremsenbude.de%2Fleuchten%2FA.E.I.__catalogue_Mercury_1956_section_9_a.jpg&hash=6a7365875955026937130bb1a8b8a079127d7695)
Source: A.E.I. Lamp Catalogue, August 1956
I am particularly interested in the MBF/U 400 lamp with its unusual shape.
Does anyone know the reasons why this cylindrical shape was chosen and not an isothermal shape, like RADIUM did in Germany for example?
![](https://www.lighting-gallery.net/proxy.php?request=http%3A%2F%2Fwww.bremsenbude.de%2Fleuchten%2FA.E.I.__catalogue_Mercury_1956_section_9_b.jpg&hash=658966c110b8bbb2b1d885df954c2fe0addef30b)
Source: A.E.I. Lamp Catalogue, August 1956
I also find it remarkable that the lamps MAF/V 400W and MBF/U 400W were still offered in parallel in the range.
I would have guessed that the obsolete MAF/V 400W lamp would have been taken out of production immediately when the new MBF/U 400W lamp was produced.
The second lamp that interests me is the MBT/U 200W.
Who has seen these lamps before? As always: additions are welcome
Regards
Olav