What do you think about this lighting kit

[Derrel]

There's a lighting forum on here BTB.

Someone on another forum figured that at about 10' with a modifier, it would take a 2000w/s dynalite pack on one head to overpower the sun in bright sunny conditions. Take that as you will, but depending on the outside conditions, the modifiers used, and the distance of the flash to subject, power can be a big issue as Mike pointed out. On the flip side, you want to make sure you can turn a powerful flash down enough for it to be effective enough when inside.

One thing about Dynalite is the way their heads are made..they have a fairly small sort of "built-in" reflector, and they are VERY compact, small heads. I believe that the "built-in" reflector system DYnalite's stabndard heads use is NOT very efficient; their heads are designed for smallness, light weight, and maximum portability.

My own testing shows that in August, the brightest,sunniest month of the year, a Speedotron 102 head with 11.5 inch , 65 degree beam spread, standard reflector can overpower southern exposure sunlight reflecting off of a light gray house and light concrete patio, at 400 watt-second setting using an old, cheap $500 used 2401B, six-outlet power pack, from 15 feet away, light to subject, at ISO 200 at f/13 and 1/200 second on a Canon 5D.