I'm not sure if they are all the same or not. I have a Light & Motion Stella 300. It has two 150 lights for a total of 300. The cord is not very long at all. Maybe 6". I mounted the two lights and the battery on a 6" piece of pvc pipe and then used a split tee pvc pipe as a quick release. That way when I stop somewhere I just pull the whole thing off and put it in my bag. It takes 2 sec. on and off. I'll send pics if you want.
It is the best light I have ever used. I bought last December with Christmas money and have used it all the time. It is a great light.