[QUOTE=Lex Fati;16482855]Busted knuckles, what SP hub model do you have? The "S" series (SD-8, SV-8) hubs are designed to output 3.0w on 20" wheels (2.4w on 700c wheels), similar to the Schmidt SonDelux.

The "P" series (PD-8, SD-8) on the other hand, is designed to output 3.0w on 700c wheels, like the Son 28.

For an accurate comparison of the two brands, the models of both hubs would need to be known. In any case, I have not noticed any observable difference between the light output of the SP PV-8 and the Son 28 at either walking or riding speeds.



I have the pd 8 on the big dummy. Both bd and lht have 26 inch wheels. I do have a better light on the lht. There is a definite difference between the two at walking speeds. Tail lites on both bikes.