Re: [Amc-list] Blue LED tamed

[Tom Jennings <tomj@xxxxxxx>]

Also, LEDs are highly directional. Most of them have 15 - 30
degree wide beams! That *is* flashlight territory. That's also
how they get the claimed high brightnesses, but concentrating
into a spot (marketing is marketing).

If you get a 'water clear' LED you can see the LED device inside
it, way at the bottom. The rest is lens! Be careful, about 0.5mm
above the tiny die containing the LED is a wire a few microns
in diameter. Break that, it becomes a DED (Dark Emitting Diode).

You can grind all that lens down and radically change the beam
pattern; just a rough file and flatten the end will really
diffuse the beam, and is what I do for lighting panels and
gauges. Or rub it with sandpaper. You won't lose or block light
just spread it.

More than you ever wanted to know about LEDs.

http://en.wikipedia.org/wiki/LED

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