I still have a couple norman and spedo sets but have converted to mono lights. Did so 6 or 8 years ago and won't go back. I love them! They range in volume from 1600w/s to 200. It is so nice to have self contained cases that you unload at the loction where you want the light then tear down and go. everything you need (cables, reflecters, radio slaves) all together. They are all packed in cases a little larger than a brief case and marked. It is so easy. If we're shooting interiors we grab all the cases. smaller jobs you just grab what you need and run. Larger spaces need more light so I was worried about using the smaller monoligfhts but as it turned out I only lost about 1/2 a stop. Pretty amazing! We're usually at around 11.5 (single pop) for the larger spaces and what ever we want for smaller spaces. As far as durability I've only lost one unit. It was the first unit we bought and it was a tester I bought used, so who knows what it went through before we got it. The norman and speedo stuff worked great! but for effiency they are slow and cumbersum. They also rattle the walls trying to suck power into the capacitors. periodically blowing circuits if were'nt careful about how many we run in line. With the mono heads this problem dissapeared.
