Lighting fan still a Noob: I need a formal iintro to LED's, good introduction

[onemorejolt]

I need an introduction to LED set up , electronics and troubleshooting.
I am a self taught electronics amateur and need to get more sytematic/formal.
I have assembled ebikes and LED systems repaired stuff, but need to get better

Can anyone recommend a good basic introduction?

Thanks and appreciate the things I have read here