Originally Posted by GAS GUY
What happened to 4300 k being the closest to daylight ?
That was always the standard when choosing Hid.
The efficiency of incandescents drops of as temp goes up. So, for the same watts in at 4300k you got more photons that at 6000k.
What the story is for LED's, no idea. White LED's push out UV and get it converted to 'white' with phosphors. It's not necessarily the same as for HID's though. I'd suspect it depends on what the most efficient phosphor mix is.