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)
           F14 width (dimension)
           F15 height (dimension) these two affect amount of daylight let in by window

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