If he wanted a 50watt LED flashlight why would he bother using extremely low power LEDs? 50 watt leds are available. They’re actually about 50 1 watt leds on one chip.
http://cgi.ebay.com/1-PC-50W-WATT-HIGH-POWER-WHITE-LED-Light-Lamp-4000Lm-/120587276035?pt=LH_DefaultDomain_0&hash=item1c138fcf03
50 Watt, 4000 lumens, $60
That’s 1500 lumens less than the average commercially available standard glove box flashlight.
Thanks,...very interesting.