Current Limiting Bulb Advise needed

[william1981]

Good Day All

I need some advise on a Current Limiting Incandescent Light Bulb that I want to place in front of my Amp I am busy restoring for testing.
i was able to get a hold of
x2 15W
x1 60W and one 100W bulbs

now my question is what would be the best one to use, the 2 15W in series or paralell or the single 60W or 100W.

 

[Family_Dog]

 

[william1981]

 

[william1981]

 

[Sarel.wagner]

 

[Family_Dog]

 

[Sarel.wagner]

 

[william1981]

 

[Mars]

 

[1200GXman]

 

[Family_Dog]

 

[william1981]

 

[Family_Dog]