While I think these Rosette Adapters can solve many problems when adding certain accessories, keep in mind that these are small 'spot lights' optimized to throw light to a distance and focus a narrow beam. These weren't meant to be big key lights and adding too heavy a softbox could add unnecessary strain to these portable lights. Right now these are only available when purchasing the optional Bowens adapter, as you won't need them when operating these lights 'as is'.
Here's a product overview on the new Boltzen 55w and 30w LED Fresnel Video lights. What they come with, a run through some of the features, and few samples with Flood, Spot, and without the fresnel lens. Anyone working with hard spots like the Lowel Pro Lights, should really find these lights a joy.
The Boltzen 55w and 30w LED Fresnels are compact yet put out a good amount of power and the Fresnel lens has strong output even at a distance. The lights can be battery powered and stay cool to the touch (unlike pro lights), and you don't have to worry about fragile halogen bulbs burning out or breaking. You can use the lights without the fresnel lens for wider throw.
Keep in mind there are two things not seen in this video. First I didn't show the D-Tap cable which allows you to power these lights off of your V-Mount or Gold Mount batteries. They recently just added this D-tap Power cable as part of the standard kit, so anyone ordering one may have it in their case. Second is the Wifi control. There is a port on the back to which you will attach a wifi dongle. Then you can control it through a remote (or possibly iPhone app). This (optional) part was also not available yet during the making of this video.
If you're on a budget or super concerned about fan noise, the 30w is a great option. But personally I think the 55w is the way to go. The fan is barely audible from a short distance away. They 30w and 55w both share the same size. At this moment I think CAME-TV may be offering the smallest 55w LED Fresnel under $300 (cheaper when buying sets). I find these could be a perfect little compact hard light to keep in your kit.