I don't know what emitters they are exactly. I tried to take it apart enough to see but when I got down to where appeared to be glued I had to stop. Hospital property and all that.
I took it apart as far as I could and had to stop before I could get the lens and optics out 😕 My guess would be CREE because they seem to be in all the other medical devices (microscopes, surgery lamps, etc).