Crowd PostFx tutorial threads: here
Credits:
Santicruyff released a stadium lighting mod for 2k19 (viewtopic.php?f=241&t=106460) where he edited the Stadium PostFx Luminosity value (luminosity range) so that the stadium lighting have a more realistic hue. I used his stadium PostFx files as a base and ported them to 2k18. Mostly bringing the brightness down to acceptable levels. (A direct conversion resulted in very bad lighting. some small edits had to be made.)
Now, for the 2k18 mod:
Based on Santicruyff 2k19 Lighting Mod (link) I have adjusted the stadium lighting for all 30 current nba teams. I haven't adjusted the floor texture (fxx.iff) and i haven't adjusted the stadium floor lightmap files (sxx_floor_lightmap.iff). Just for full disclosure

lighting files download: https://drive.google.com/open?id=1807_0cVaO9VzNSoHqCRheY0cj5ammLHc (small download for advanced users)
Advanced Method instructions: drag PostEffect.FxTweakables into your stadium iff to change the stadium lighting.
global Download: https://drive.google.com/open?id=17fFwjWOgxkM3mD_-YG5VxZXLQ7mSKJBa
**** Note**** Stadium file will work with any floor file and any stadium floor lightmap file. Can use any floor file with the stadium files from this mod. if that makes sense. So, if you don't like the Hornets Court or the Kings Court, just use a different floor file from your favorite modder.
76ers Wells Fargo Center

Blazers Moda Center

Bucks Bradley Center

Bulls United Center

Cavs Quicken Loans

Celtics TD Garden

Clippers Staples Center

Grizzlies FedEx Forum

Hawks Phillips Arena

Heat AAA

Hornets Spectrum Center

Pelicans Smoothie King Arena

Jazz Vivint Smart Arena

Kings Golden 1 Arena

Knicks MSG

Lakers Staple Center

Magic Amway Center

Mavs AAC

Nets Barclay Center

Nuggets Pepsi Center

Pacers Bankers Life Field House

Pistons Little Ceasers Arena

Raptors Air Canada

Rockets Toyota Center

Thunder Chesapeake Energy Arena

Spurs ATT Center

Suns Talking Stick Arena

Wolves Target Center

Warriors Oracle Arena

Wizards Capital One Center

Any updates i will post here.