Joe, I'm researching available reflectors and other modifiers that could possibly fit, or be easily modified to fit the 77mm thread in the front of the light. I tried a red color filter on it... wow, what a nice mood light!
But I will keep searching for more modifiers. I was thinking that maybe the Strobies line from Interfit might work, but having never handled them, I can't tell for sure. For now umbrellas will have to suffice. Oh, and that red filter too
Tony, if I was going to sell this, it would probably be for around $800. But I have to fine tune the design, shave cost, and improve the cooling in the next iteration.
I have found that the light gets really hot after about 30 minutes of continuous use at 100% power. Not having a proper thermometer that can accurately measure the temperature of the front aluminum disc, I am weary to leave it on for longer periods. The specifications say to operate below 212 F in order to maintain long life - the LEDs are rated to work up to 302 F. At 50%* output the internal heatsink and fan more than take care of the heat, and it remains cool enough until the battery dies. Speaking of which, at full power I got about 4 hours and 17 minutes runtime. A bit less than I was hoping for. Maybe the fan is eating up more energy than I expected.
(*) Something strange I noticed is that when the light is set to 50%, four LEDs light up. I made sure to separate the wiring into two distinct channels of 3 LEDs each, yet an LED is turning on when it really shouldn't. It doesn't happen when I turn on the light after a period of inactivity, but going from 100% to 50% seems to induce this behavior.
I guess the power is really split in 0%, ~70% and 100%. I did check the soldering points and wires, and did not see anything that would lead to this.
I also tested the light outside to try to fill-in shadows... unfortunately it's not strong enough to make any difference in direct sun
However, in light to deep shade the Riegel worked much better. I will have two more weddings coming up Friday and Saturday, and I hope I can get to use it after the sun goes down. One of my co-workers shooting with a daylight WB setting (on a 5D Mk I) seems to get perfect color rendition, though I did not check the histogram to make sure. I just know my D3 seemed to love the light outside at night in AWB. More to come later.