ProX XT-LSTBAR-5FT Universal 5ft Lighting Cross Bar w/Bolts 

The ProX XT-LSTBAR-5FT lighting crossbar does the job and on the plus side the unit is square instead of round some people like that and this makes it easier to mount light fixtures directly without the need for clamps. It's also more stable than most round bars and it has no tendency to roll on its axis as it is loaded with fixtures.

So if your looking for a quality made Lighting Bar the  XT-LSTBAR-5FT is the right bar for you.