So a guy with an RB 67 comes into my office ...

[JOR]

[QUOTE="(I have ~10,000ws of flash power. )

Could you elaborate a bit on that. It does the trick for sure. The night shots are nice.[/QUOTE]
1 watt-second is equivalent to a one-second exposure with one watt of illumination - also called one joule. So 10,000 watt-seconds is equivalent to 1 watt of illumination for 10,000 seconds. Or, more practically, 10,000 watts for 1 second. Since electronic flash (strobe) illumination is usually all over in less than 1/500 second, the illumination is equivalent to 10,000 x 500, or five million watts for 1/500 second. The power is absorbed into a bank of capacitors, typically taking a few seconds, then released through the flash (strobe) tube on command from the camera shutter.

 

[spijker]

As an electrical engineer, I'm somewhat familiar with the physics and math behind the electronic flash. I was more curious what kind of flash units and how many Kent is using to get to such an amount of flash energy. Turns out he uses 8 White Lightning X3200 monolights of 1320 Ws each. Impressive.