Here is a good article about LED styles. You can download this to your PC for more in depth reading.
http://issuu.com/mr-hobbyist/docs/mrh12-03-mar2012-ol/37?viewMode=presentation&mode=embed
I wish Bachmann would jump on board with the MRH site as it is growing quite rapidly with users from across the Pond and even down into Oz. I see discussions about Bachmann products once in a while and the one who runs the site is a model railroader.
Rich
Keep them coming Rich. I save all your links for later when I have time to read them. Right now I am at lunch.
Thanks Again
Jerry