ISO: Roof mounted strobe light bar

google truckntow

 

can't view picture, makes the page crash

 

That one in your picture looks like a roll your own that's mounted to the exhaust brackets.

A lot of those lightbars come with brackets on their own, if that's not tall enough to clear your horns and cab lights I think a piece of aluminum rectangular tubing boxed off would make a pretty good spacer, especially if painted to match your cab. Not sure if I would trust well nuts to that job or find someone who could do a good job installing some rivet nuts. And plenty of silicone to keep water out.

 

Some states say that the lights must be able to be seen from rear when loaded, so a tube that can have pins in it to adj it on different loads?