Need some L.E.D bulb schooling

So I am looking for some knowledge on LED bulbs and the effects on the electrical system overall from someone who KNOWS their stuff.....

I would like to replace ALL the bulbs in the duster with LED replacement bulbs and from what I understand I will need to replace the flasher with a electronic LED flasher, I have shopped around at several places... Year one, Ron Francis, and Spaghetti engineering/Digi-tails and would like to give Spaghetti engineering my business but before I do I want to understand the ramifications of what I may be doing I really don't want to endanger the new wiring harnesses I purchased.

main reasons for doing it are lower bulb temps on all my NOS lenses and less draw on my charging system.

Let the enlightening begin.......