Sims 3:0x03B4C61D

DWORD - LITE
DWORD - Version
DWORD
BYTE - 128 Section count
BYTE - 56 Section count
SHORT

-128 byte Sections 
	DWORD Type? probably type of light: point, spot etc
	31 Floats (light parameters. not all used at once)
        F1 x position in tiles (+ moves to object's left)
        F2 y position in metres (+ moves up)
        F3 z position in tiles (+ moves in front of object)
        F4 red 0-1
        F5 green 0-1
        F6 blue 0-1
        F7-F31 varies according to Type
        
        Type 0x03 (point)
           F7 intensity
        Type 0x04 (spot)
           F7 intensity
           F8 (0-1) affects direction rotation about y
           F9 (0-1) affects direction rotation about z
           F10 (0-1) affects direction rotation about x
           F11 affects cone angle.  Probably bare degrees
        Type 0x07 (window)
           F7 (I couldn't get this to do anything - ymmv)
           F14 width (dimension)
           F15 height (dimension) these two affect amount of daylight let in by window
        Type 0x09 (area)
           F7 intensity
           F14 width (dimension)
           F15 height (dimension) these affect area of the light source and thus amount of light.


-56 byte Sections
	DWORD 
	13 FLOATS (light parameters. not all used at once)

Notes:
Intensity affects decay (how far the light reaches) rather than apparent brightness at source.  
Use the colour (rgb) settings to make softer lighting.