The lamp that you need if you had 115 volt power, is a PH 212. It is a 150 watt enlarger lamp and is sold by the Bulbman.com and BandH Photo.com I don't know about your voltage though. I imagine that you are at 230 volt service.
I think that the correct bulb will make a big difference.
I had to design a retrofit involving a reflector for my Durst 138S
when I went to a 1000 watt lamp...so bulb (hence physical size of the light source) makes a big difference.
Art is a step from what is obvious and well-known toward what is arcane and concealed.