There are many flavors, those were 3 common ones...
Addition of phosphors can broaden the spectrum greatly as the wikipedia article shows... oddly they were less efficient than I assumed (Much more efficient than incandescent, of course)
Laser diodes are MUCH narrower wavelength- but the wavelength can be 'tuned' by adjusting temperature and current (tuned over a small range, that is) Laser diodes have very high efficiency (I may be wrong, but I think some are ~60% wall plug efficiency)... actually saw an article predicting %80 in the near future