EDIT by MTS2 Staff

Gunmod, the creator of the Radiance Light System, has quit modding long ago and therefore the development of the Radiance has been discontinued.
However, other people have continued GunMod's work, or have created alternative lighting systems.

Here are some useful links to various existing Light Systems (thanks Niol for collecting and providing them); the Radiance version 2.4 can also be installed automatically using the SCRIPTORIUM (old versions 2.1 to 2.3 can only be installed by hand).

• Radiance Light System 2.1 by GunMod @ MTS2 (LINK)
  
• Radiance Light System 2.2 BETA RC1 by GunMod & Chocolate Pi @ MTS2 (LINK)
  
• GunMod's Radiance Light System 2.3 for all EP/SP by dDefinder @ MTS2 (LINK)
  
• GunMod's Radiance Light System 2.4 for all EP/SP by dDefinder @ MTS2 (LINK)
  
• Lighting Mod by spookymuffin @ InSIM (LINK)
  
• Aaron's Ambiance Mod by stargazer @ GaySimsClub2 (LINK)

And here are some links about modding the lighting.txt game file:

• How to change the blue haze in nhood
• "Lighting.txt" : How to change the sky color
• "Lighting.txt" : How to rotate the outside shadows
• Night light level

If interested, please visit the provided links and read the instructions, specifications and compatibility of each mod from its own thread


(Original GunMod's post following)
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Fixed light not traveling through arches. Thanks Daan1302
Fixed inside portal coloring. Was too colorful.
Fixed outside light spill. Objects light up more when near window with lamp/light.
Updated to Include all EP's
Auto installs for all EP's
Includes 4 Times of day for Downtown and University (if you have the EP)
This means you can party in the morning, daytime, evening and night.
So Nightlife isn't just "Night Life"

Included a manual install option for PC and MAC users. (seperate download)

Install Procedures:

Download GMRLS21-AUTO.zip or GMRLS21-MANUAL.zip

For the auto install, extract the .exe file to a temp folder, run the exe, then during the install make sure the path is C:\Program Files\EA Games

For the manual install: Extract zip file into: C:\Program Files\EA Games
Allow it to overwrite


To Uninstall:

Extract BACKUP21.zip to: C:\Program Files\EA Games
Allow it to overwrite.


Notes: Because a lot of the default lots use the broken Maxis Diffuser light,
you will want to go in and change the lighting esp. in Downtown lots in Nightlife.
Sorry about this, but it's not my fault Maxis chose to use the broken one


This was made for ENGLISH version installs of the Sims 2.

If you have a NON ENGLISH version of the Sims 2:
Extract the manual version to a temp folder.
Copy the lighting.txt file found in:
The Sims 2\TSData\Res\Lights

to SIMS@NAME\TSData\Res\Lights

Where SIMS@NAME is whatever The Sims 2 folder is called

Next copy the Lighting.txt and downtown_lots.txt files found in:
The Sims 2 Nightlife\TSData\Res\Lights

to SIMSNIGHLIFE@NAME\TSData\Res\Lights

Where SIMSNIGHLIGE@NAME is the folder you have for The Sims 2 Nightlife.
Note these are both in Program Files\EA Games


So make sure that if you own a NON ENGLISH version, that the install
program points to your Sims 2 folder.


Works with All or no Expansion Packs.
If you do not own Nightlife it will still create a harmless folder called:
C:\Program Files\EA Games\The Sims 2 Nightlife.
If you do NOT own Nightlife, this folder can be safely deleted after the install.

Do NOT use Smart Lights 2 with this!
THis version overwrites any previous version.

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2115 people have said thanks to GunMod for this download.

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For more information about this creator and their policies or details, click here.

Basic Download and Install Instructions:

1. Download: Click the download link to save the .rar or .zip file(s) to your computer.

2. Extract: Use WinRAR (Windows) or Stuffit (Mac) to extract the .package file(s) from the .rar or .zip file(s).

3. Place in Downloads Folder: Cut and paste the .package file(s) into your Downloads folder:

• Windows XP: Documents and Settings\(Current User Account)\My Documents\EA Games\The Sims 2\Downloads\
  
• Windows Vista: Users\(Current User Account)\Documents\EA Games\The Sims 2\Downloads\
  
• Mac: Users\(Current User Account)\Documents\EA Games\The Sims 2\Downloads\

Need more information?

• For a full, complete guide to downloading complete with pictures and more information, see: Game Help: Downloading for Fracking Idiots.
  
  
• Custom content not showing up in the game? See: Game Help: Getting Custom Content to Show Up.
  
• Anyone can use both .rar and .zip files easily! On Windows, use WinRAR. On Mac, use Stuffit.
  
• If you don't have a Downloads folder, just make one. See instructions at: Game Help: No Downloads Folder.