I'm flashing a Fenix P3D CE bar mounted (160 lumen), a Fenix P3D Premium 100 helmet mounted (200 lumen) and a Cygolite Tridenx bar mounted (unknown lumens but brighter than both of the Fenixes). Of course I don't flash them at night...that would be way too disorienting for me, let alone everybody else.

With the Wilma, at 830 lumens with 4 LEDs, that would be 207.5 lumens per LED, so would flashing a Wilma be much different than flashing 4 200 lumen lights? I'm probably near (or above) 800 flashing lumens with my current setup, but the emitters are spread over a larger area than they would be with a Wilma, and I'm producing the light with 5 emitters instead of 4, so each emitter is slightly less bright.

What's the flash mode like on the Wilma anyway?

Also, on a side note, motorcycles are starting to run flashing headlights during the day as a safety device.
See:
http://www.youtube.com/watch?v=7tdL0AkmkJQ

California vehicle code allows the modulation of a motorcycle headlight between high and low beam at a rate of 200-280 flashes per minute. I'm sure a motorcycle high beam is putting out more than 830 lumens. It is still not legal to run any flashing lights on a bicycle in California, but not enforced.