thanks loose the scale clue pointed me in the right direction (I think)
help had this to say..
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A layer style may have been tuned to look best on a target resolution with features of a given size. Using Scale Effects allows you to scale the effects contained in the layer style without scaling the object to which the layer style is applied.
To scale a layer effect:
Select the layer in the Layers palette.
Choose Layer > Layer Style > Scale Effects.
Enter a percentage or drag the slider.
Select Preview to preview the changes in the image.
Click OK.
but alas when I try to select "Scale Effects." it is greyed out so I cant select it