"Oh really...? Big mistake not knowing what you're talking about."

Excuse me, sir. LPS outputs far more lumens versus HPS, which is why it's preferred in highway/parking lot/street/airport lighting. He most certainly DOES know what he's talking about.

Call my pal Jason Chambers of Memphis Concrete Cutting at (901) 365-9331. We used to install the things.

LPS = 180+ l/w, HPS = 140-150 l/w.

LPS is better for human visual purposes, or at least perceptibly brighter, which is EXACTLY WHY it's used in street lamps.

You only usually see HPS/MH in camera-recorded parking lots where color rendition is a requirement for video surveillance.

Really, Rusty, I also would have thought you'd know that LPS is used specifically because of the lower light pollution as well, which is why they're the *ONLY* choice of light used around astronomical observatories.