Brucey wrote:you might be better off fitting your light to the bag; many bags have a fitting for this.
Some lights come with a ribbed plastic insert that can be cut to fit funny-shaped stays; its just a question of finding the right one that will fit your stays.
BTW if the light is low down on the stays it may not be so visible and there is always a chance of it being knocked into the wheel spokes and causing an accident, so be careful.
cheers
Thanks - I'll look into that.
This issue arose after changing my seat recently - the pillar bag is now secured by the cross strap too far towards the front, making it rear heavy & sag down over the pillar light. So maybe any light fitted would point downwards, rather than horizontally...