Hi there. I'm having a hard time getting the concept of an LED-Driver. It seems like you can just throw any led at them, and they will handle it. Don't leds have requirements for voltage and current? How do you regulate the current with LED-Drivers? Are they adjusting automatically to not fry the leds? If so, on what potential are the leds running (80%, 100%?). Do the leds have to be all the same (specwise), or can I connect different leds to one driver? Thanks a lot!