Easier to filter out than incandescents, not easier than the old sodium lamps. Also a single color LED is not too bad. But a (good) white LED has many primary

Easier to filter out than incandescents, not easier than the old sodium lamps. Also a single color LED is not too bad. But a (good) white LED has many primary color LEDs and phosphors to broaden the color spectrum as much as possible. But IMHO, wrt to incandescents they still suck.