I've had dozens of these from Limo Studio but they were all broken. The threaded bushes are out! I'm a photography teacher, so I need at least 15 working models. This is an improved design. I give it a road test and it's holding up well. I like the dual design because it accommodates a large 105W CFL and a small LED spotlight. This is a very good key lighting effect for portraits without a lightbulb.