Replacement Bulb for Durst 138S?

[Doc W]

Have any of you tried this as a replacement bulb for the Durst 138?
https://www.interlight.biz/light-bulb/DURST-LABORATOR-138
https://www.interlight.biz/light-bulb/DURST-LABORATOR-138

 

[ic-racer]

If the length is really 120mm, then the globe is might not even be the 65mm minimum globe diameter (far right column) so it would likely only be good for small format enlargements. For $8, I'd try it and see.

 

[AgX]

Diameter of that bulb in question is 65mm.

 

[Ron789]

I have experienced very good results with household LED bulbs. Cheap, easy to purchase, no heat production, strong light output, long lifetime. I will never buy traditional tungsten bulbs again. Don't worry too much about the bulb diameter; in reality I found it makes very little difference. In fact, I got more even results with small bulbs than with some very large bulbs.

 

[Luis-F-S]

Get the G40 bulb 150 watts and a large enough envelope

 

[ic-racer]

Get the G40 bulb 150 watts and a large enough envelope

 

[Doc W]

The G40 is certainly large enough but it doesn't seem to throw a lot of light. I found a 300 watt frosted Sylvania bulb which seems to be powerful enough and does have a lot of fall-off around the edges. I also found an LED floodlight that looks like it might do the trick. What are the requirements in terms of quality of light for Ilford Multi Grade Filters? The LED output is 850 lumens and the colour temperature is 3000K.

I am going to try all of these over the weekend and see how they print.

 

[wiltw]

The A21 shaped 150W bulbs I have located are low light output...1300 Lumens up to 1500 Lumens, falling far short of the 2800 Lumens that the bulb which is linked in the OP

 

[AgX]

What are the requirements in terms of quality of light for Ilford Multi Grade Filters? The LED output is 850 lumens and the colour temperature is 3000K.

Sam seems to have found out that it does not make much difference concerning incandescant lamps:
https://www.photrio.com/forum/threads/colour-temp-of-enlarger-globe.163119/

 

[ic-racer]

I had a condenser head I'd replace the lamp with a opal disk and shine a halogen lamp or whatever lamp I wanted on the disk form behind...wait...I have a condenser enlarger and that is exactly what I have done...