You don't, you need "be seen" lights.
I didn't finish watching that video (too long), but it seems riding a recumbent in a busy city street with double-deck buses is to invite them to run you over. Also what's the fun to be going at the feet of every bus, truck, car, cyclist? Breathing the dusts?
Yeah, no thanks. I guess if I had no other bicycle options I'd have to find a way and adjust, but otherwise, riding a recumbent bike or trike in big cities just seems not worthwhile.
Chaad--'95 DeKerf Team SL, '02 Lemond Buenos Aires, '05 Novara Buzz, '73 Schwinn Collegiate, '06 Mountain Cycle Rumble, '09 Dahon Mariner D7, '12 Mercier Nano, '12 Breezer Venturi
I guess I don't really see the cause and effect between the thread title and that video. If anything, what that video says to me is "here's why you need a front (not overly high powered) blinking light to identify yourself as a biker and stand out from the overwhelmingly large amount of visual noise.
I think something like a Planet Bike 1 watt front light on blinking mode would be more effective than more lumens for being seen in that situation.
As to the OP subject; No need for a solid bright light on front for seeing with all those street lamps so it was smart to go with flashing front light. If I was riding a recumberant I would also go with a helmet lamp, flash or low power solid just to paint a bigger picture.