content: We live in the future.  They should not only be able to come in different colours but they should all run f.lux or something similar so they always generate the right kind of light depending on both the time of night and time of year it is.  Hell they should even be able to do things like strobe for riot control and all kinds of cool shit like that.  It's almost insulting replacing HPS lights with the dumb technology they're using.