Okay so let's break this down.
High end Led lights these days emit around 220 lumens per watt of electricity, and they produce around 3.1umol/J.
But a high end High Intensity Discharge light like High Pressure Sodium, Metal Halide, or Ceramic Metal Halide will only produce a max of around 160 lumens per watt and 1.9umol/J.
So on paper LED is king it produces more visible light and emits more photons per second than a High Intensity Discharge light source.
But keep in mind I have spoken with a number of growers that say High Intensity Discharge lights will penetrate deeper into the canopy vs LED.
Light-Emitting Diode vs High Intensity Discharge lighting
Light-Emitting Diode vs High Intensity Discharge lighting
am I less holy because I smoke a blunt and drink a beer? - 2pac