In the lamp catalog of METROPOLITAN-VICKERS from 1952, there is a lamp MA/H 2500W in the table of mv-lamps.


Source: METROVICK lamp catalogue 1952, page 20

I do not assume that this is a printing error. It could have been a lamp for photochemical or repographic purposes.
Has anyone ever seen this lamp with 2500W or even heard or read about it ?