I'd run two tail lights, at least one good one like a planet bike superflash or nite rider cherry bomb. One headlight is sufficient if the route is well lit (it's more to be seen than to light the way). I'd be sure to have side reflectors or reflective sidewalls and I would wear a bright colored ANSI rated reflective jacket.

This may be more controversial, but I wouldnt bring any comprehensive tools or any tire repair supplies on a route that short.