Metal halide (MH) bulbs have been used for a long time now in street lighting, low-pressure sodium vapor (LPS) was just one of the first applications of the tec

Metal halide (MH) bulbs have been used for a long time now in street lighting, low-pressure sodium vapor (LPS) was just one of the first applications of the technology. Metal halide has a much whiter/bluer light and covers more of the spectrum than LPS. I do believe though, that LEDs for such industrial applications don't or shouldn't suffer the same issues as the little LED bulbs we buy for the home, due to better QC and construction.