Find and Replace...

composite.fsh
FIND:
#define Moonlight 0.003
REPLACE:
#define AmbientMulti 0						//[-0.006 -0.0015 0 0.0015 0.006]

#define EmissiveMulti 1						//[0.125 0.25 0.5 1 2 4 8]

#define Moonlight 0.003
FIND:
vec3 emissiveLightC = vec3(1.5,0.42,0.045);
REPLACE:
vec3 emissiveLightC = vec3(1.5,0.42,0.045)*EmissiveMulti;
FIND:
color *= (finalShading*LightC*(isnsun?SkyL2*skyL:1.0)*2.15+ambientC*(isnsun?1.0/(SkyL2*skyL*0.5+0.5):1.0)*1.4)*0.63;
REPLACE:
color *= (finalShading*LightC*(isnsun?SkyL2*skyL:1.0)*2.15+ambientC*(isnsun?1.0/(SkyL2*skyL*0.5+0.5):1.0)*1.4)*0.63+(AmbientMulti);

world-1\composite.fsh
FIND:
xziUB8O.png
REPLACE:
xziUB8O.png

#define AmbientMultiNether 0				//[-0.006 -0.0015 0 0.0015 0.006]

#define EmissiveMulti 1						//[0.125 0.25 0.5 1 2 4 8]
FIND:
vec3 emissiveLightC = vec3(1.5,0.42,0.045);
	/*------------------------------------------------------------------------------------------*/

	color *= emissiveLightC*(emitted*15.0*color + torch_lightmap*ao)*0.66;
REPLACE:
vec3 emissiveLightC = vec3(1.5,0.42,0.045)*EmissiveMulti;
	/*------------------------------------------------------------------------------------------*/

	color *= (emissiveLightC/EmissiveMulti)*(emitted*15.0*color + torch_lightmap*ao)*0.66+(AmbientMultiNether);

lang\en_US.lang
FIND:
option.EmissiveLightStrength=Lighting strength
option.EmissiveLightStrength.comment=Adjust the lighting strength of emissive blocks, like torches.
REPLACE:
option.AmbientMulti=Ambient Light Multiplier
option.AmbientMulti.comment=Adjust the brightness of dark areas like caves
value.AmbientMulti.-0.006=Very Dark
value.AmbientMulti.-0.0015=Dark
value.AmbientMulti.0=Default
value.AmbientMulti.0.0015=Bright
value.AmbientMulti.0.006=Very Bright

option.AmbientMultiNether=Nether Ambient Light Multiplier
option.AmbientMultiNether.comment=Adjust the brightness of dark areas in the nether
value.AmbientMultiNether.-0.006=Very Dark
value.AmbientMultiNether.-0.0015=Dark
value.AmbientMultiNether.0=Default
value.AmbientMultiNether.0.0015=Bright
value.AmbientMultiNether.0.006=Very Bright

option.EmissiveMulti=Lighting Strength Multiplier
option.EmissiveMulti.comment=Adjust the lighting strength of emissive blocks, like torches.
value.EmissiveMulti.0.125=Hopeless
value.EmissiveMulti.0.25=Very Dark
value.EmissiveMulti.0.5=Dark
value.EmissiveMulti.1=Default
value.EmissiveMulti.2=Bright
value.EmissiveMulti.4=Very Bright
value.EmissiveMulti.8=Blinding
FIND:
screen.SHADOWS_SCREEN=Shadows
REPLACE:
screen.LOWLIGHT_SCREEN=Low Light Brightness
screen.LOWLIGHT_SCREEN.comment=Brightness settings for things that aren't the sun. Ambient Light. Lighting. Moonlight. §4Do not redistributed this modified shader pack as that violates Sildur's Copyright agreement!

screen.SHADOWS_SCREEN=Shadows


Shaders.properties
FIND:
[BLOOM_SCREEN] [DOF_SCREEN] [FOG_SCREEN] [MB_SCREEN] [PARALLAX_SCREEN] [SKY_SCREEN] [SHADOWS_SCREEN] [WAVING_SCREEN] SSDO Colorboost Celshading MobsFlashRed IceGlassReflections Moonlight MC189 Whiteworld

#Sub-screens:
REPLACE:
[LOWLIGHT_SCREEN] [BLOOM_SCREEN] [DOF_SCREEN] [FOG_SCREEN] [MB_SCREEN] [PARALLAX_SCREEN] [SKY_SCREEN] [SHADOWS_SCREEN] [WAVING_SCREEN] SSDO Colorboost Celshading MobsFlashRed IceGlassReflections MC189 Whiteworld

#Sub-screens:
screen.LOWLIGHT_SCREEN=AmbientMulti AmbientMultiNether EmissiveMulti <empty> Moonlight