ECN Forum Forums General Topics of the Trade General Discussion Area Supporting a octagon box in a dropped ceiling

I'm using a "T" bar to support a 4" octagon box for an exit light in a lay in ceiling. I know Arlington makes a stud that a cable can be secured to that inserts into the back knock out of the box, but the screw and bracket for the t bar takes up the room. Any other ideas how to support the box independently of the grid and still use the "t" bar thanks