Originally Posted by
cyccommute
That light isn't an "arc discharge" lamp. The light you linked to is a light emitting diode which is an entirely different technology and principle from an arc lamp.
I'm not sure what light jdavis and ItsJustMe are talking about.
ItsJustMe mentioned that a car headlamp is 1000 Lumens, but the arc discharge lamps are ~3200 Lumens for a D1S used in car headlamps.