Originally Posted by
farmerfrederick
Yes, the unit that I bought and wrote the guide about does have a high and low beam. Basically, the light consists of 15 LEDs, arranged in 3 rows of 5. On low beam, the whole bottom row and half of the middle row light up. On high beam, all of the LEDs are lit. This is why I mentioned that you should test the light before installing it back in the housing, so that you make sure that on low beam the light is oriented properly with the low beam section on the bottom. I'm not quite sure, but I think the low beam also has more "flood" type LEDs, while the high beam is more "spot" type LEDs. If this is the case, orientation of the light is even more important.