Joe,
Don't know the area your trying to cover, but rather than try to filter tungsten to LED's why not just rent 1x1 LED Lightpanels. They make a version with a variable color temp, which is probably just some kind of faux coloration, though we have some and they work well. Just turn the dial until it matches, or you like the look.
Keep in mind the LED's are kind of strange to light with. When direct they produce a lot of light, but bounced, or diffused they drop off quickly, so if you need three 575 HMI's you'll probably need 6 light panels.
IMO
BC