LED Information

2 questions:

1.  Where can I get information (detailed) on LED's?

2.  Does the resistor go on the + or - side of a component?

Contact the supplier of the LED for info.  Keep in mind though that LEDs vary from one to another, even in the same batch, so the ratings are averages, not set in stone.

The resistor is only there to limit the current of the LED, so as long as its in the circuit it doesn't matter if its before or after the LED.  Most people put the resistor on the positive side believe electrons flow from + to -, when in fact they actually flow from - to + (according to the electron theory)  Glad to see some of that college education I'm still paying for is being used for something!

The two most important parimeters are the forward current and the viewing angle.  I've honestly never worried about the forward voltage.  If you supply the correct current things should be fine.

The viewing angle will determine how widely the light is diffused from the LED.  The wider the viewing angle the more like a conventional light bulb the LED will act (and the more it will cost).  LEDs typically have a very narrow light path, with the normal viewing angle being between 15-20 degrees.  If you can find some 30-35 degree LEDs you'll notice a vast improvement in illumination.