LEDs: Need opinions current to 2019 technology.

[OrcishOrchids]

I'm looking for straightforward hands on experience growing orchids indoors without sunlight using only LEDs. Preferably LEDs of today rather than decades past. this is no longer a suspect/new technology so we should have some facts by now, but the internet is convinced I must be growing weed and I can't seem to find anything conclusive in the forum.

So here is my question:
What's the real difference between a WHITE led grow-light and a regular WHITE led light of equal watts/lumins? Why can't I use a 5000-6500k shop light?

For the sake of simplicity I am ignoring all the purple lights out there and focusing on white or white-ish lights, because the purple/pink ones give me migraines and ruin my enjoyment of the plants.