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I'd like to add the following:
LED's aren’t the same as normal diodes as their reverse breakdown voltage is WAY lower (which can cause problems though we electronic engineers normally just put a Si, or Ge if need be, diode in series to prevent damage to a LED.)
True, they aren't as tough as rectifier diodes, but they're not meant to be either. As for putting a diode in series, isn't it better to put one in inverse parallel? The resistor will still control the current and you won't get more than .6V across the LED in reverse.