Tools you may want to use:
Global Editor - http://www.mediafire.com/download.php?zi783vl61w43ozb
Recurring Hex Patterns - http://www.mediafire.com/download.php?eb524c5l72iz5br
The first one is an automated tool that changes the lighting parameters that we already know about, and can also give you the float value of a hex string or the hex string of a float value.
The second one looks for recurring hex strings in any file's binary data, and gives you the float values those contain, if any. The result is saved in "My Documents\Recurring Hex\log.txt". In the same folder you'll find a "log_normal.txt" which only contains hex strings that contain a float value in the "normal" range. That means it skips all lines of the original log that contain "#E-#" or "#E+#" or "NaN". Float values that contain "#E-#" or "#E+#" are actually floats, but they're too small or too big to be lighting values normally. I doubt that the programmers used a lighting parameter of 3.82*10^-26. Still, if you want to take a look at those as well, you'll find the "log_allnumeric.txt" file contains all the lines of the original log that don't contain a NaN (not a number).
So, the first set of parameters that tatlopuyo discovered are a pair of floats with a hex string of "000040BF6666863F". This pair occurs 96 times inside the global, and has been proven to affect lighting. What I'm trying to do is discover other values that could also affect lighting. Using the Recurring Hex Patterns tool, here's what I've got. In the following quotes, I'm only including float values that are in a "normal" range and don't require a power of 10 to be represented.
12-byte sets that contain 3 float values, including the two we know about (ignore the line number; first number after the line number is the times each hex string occurs).
Line 10387: 36 0000803E000040BF6666863F 0.25 -0.75 1.05
Line 15878: 24 CDCCCC3E000040BF6666863F 0.4 -0.75 1.05
Line 18663: 20 000040BF6666863F9A99993E -0.75 1.05 0.3
Line 32336: 12 000040BF6666863FE4380E3F -0.75 1.05 0.5555556
Line 35452: 12 00004040000040BF6666863F 3 -0.75 1.05
Line 205899: 4 000040BF6666863F0000803F -0.75 1.05 1
Here's what's interesting about this table. If we ignore the 4th line (the one with the 0.5555556, which is the least probable number to be an actual lighting value), the other lines sum up to 96. However, the parameters are sometimes after the two lighting values we know, and sometimes before. Still, judging from their values and the total times they occur, they could be lighting parameters.
16-byte sets that contain 4 float values, including the two we know about.
Line 29786: 12 CDCCCC3E000040BF6666863FE4380E3F 0.4 -0.75 1.05 0.5555556
Line 30110: 12 000040BF6666863F9A99993E6666E63F -0.75 1.05 0.3 1.8
Line 30115: 12 00000000CDCCCC3E000040BF6666863F 0 0.4 -0.75 1.05
Line 30147: 12 000000C000004040000040BF6666863F -2 3 -0.75 1.05
Line 120980: 4 000040BF6666863F0000803FCDCC4C3F -0.75 1.05 1 0.8
Line 153615: 4 000040BF6666863F9A99993E0000C03F -0.75 1.05 0.3 1.5
Line 153968: 4 000040BF6666863F9A99993E000080BF -0.75 1.05 0.3 -1
4-byte sets that contain 1 float value, occuring 96 times.
Line 6278: 96 55556942 58.33333
Line 6295: 96 FC9BF23F 1.895385
Line 6298: 96 C11C3443 180.1123
Line 6300: 96 64412339 0.0001556925
Line 6305: 96 0172A741 20.93067
Line 6314: 96 20D7B442 90.42017
Line 6340: 96 2DBC6EBC -0.01457123
Line 6344: 96 5855D53F 1.666667
Line 6346: 96 9A99CD41 25.7
If you ask me, of the above only FC9BF23F and 5855D53F seem to be in the range 2K usually uses for lighting values. The other are too large or too small. 2DBC6EBC could be as well.
Still, the above doesn't say much, because the values used for the lighting parameter could show up more than 96 times. The below table is more interesting though.
8-byte sets that contain 2 float values, occuring 96 times.
Line 4513: 96 000040BF6666863F -0.75 1.05
Line 4533: 96 0000803FCDCCCC3D 1 0.1
Line 4542: 96 000000009A99CD41 0 25.7
Line 4551: 96 0000504100009641 13 18.75
First one is the one we already know about. Third and fourth look suspicious, due to their large values. The second one however could be a pair of lighting values. It occurs 96 times and is in the range 2K uses.