LED questions

[jadaro2600]

I just got a green 4 pin LED,

What do the following mean:
"High flux output"
960 mlm
...I understand the rest, i'm assuming that the forward current of 20ma means that it uses 20ma of power per hour.

Also, what use is a 4 pin LED good for or is this just a structural implementation?  The LED is insanely bright when hooked to a cellphone battery - like retina damaging bright.  There is no mcd attribute for this LED on the packaging.

The item: http://www.radioshack.com/product/index.jsp?productId=3125356

*please note the forum status 'newbie'

[MrMag]

Jad,

From looking at the picture, It would appear that the 4 pins are actually 2 cathode and 2 anode connections used for structural mounting as you implied. Here is a website that might help you out with any questions regarding LED's.

http://www.theledlight.com/technical.html

P.S. I haven't seen the mlm rating used before ??

[Michelinho]

Hi,

960 mlm means milli Lumen

The lumen (symbol: lm) is the SI unit of luminous flux, a measure of the perceived power of light.

http://en.wikipedia.org/wiki/Lumen_(unit)

Take care,

Michel

[jadaro2600]

Thank you Both!

[jadaro2600]

Yet another: Is there a such thing as a low voltage LED? ..something say, around the vicinity of .5 volts?