Jim Gunn

I want to start using fluorescent lights for digital video production and I am trying to decide between getting two seperate Diva-Lite 400 kits (each setup consisting of four 2-foot lamps in a fixture for a total of 220 watts each= 440 watts total) for just over $2,000 versus getting one of these kits the Gaffer Select Fluorescent for around $2300 consisting of two four-bank fixtures (FotoFlo 400s?) each consisting of four 4-foot lamps for a sub-total of 160 watts each for 320 total watts.

One big question occurs to me- How is it possible that the Diva's with their smaller lamps are rated with more watts than the FotoFlos with their four foot lamps?

The Gaffer Select Kit (which I presume consists of two Foto-Flo 400s)
http://www.bhphotovideo.com/bnh/controller/home?O=productlist&A=details&Q=&sku=258951&is=REG

and how is this kit different than this similar kit but cheaper B&H exclusive, the Photo Gaffer Kit with two Foto-Flo 400s

http://www.bhphotovideo.com/bnh/controller/home?O=productlist&A=details&Q=&sku=265671&is=REG


The Diva-Lite 400 Kit
http://www.bhphotovideo.com/bnh/controller/home?O=productlist&A=details&Q=&sku=258599&is=REG