Update I was able to find this info and spoke with ARB.
CRYSTAL BLUE Increases clarity.
SNOW BLUE Ideal for snow, rain and sea spray conditions. Popular for marine applications.
AMBER Ideal for minimizing glare in snow, dust or foggy conditions.
GREEN Specifically for spotting animals with sensitive eyes. Decreased visible light signature.
RED Most popular for night spotting of light shy animals. Decreased visible light signature.
INFRA RED Security, surveillance and convert police and military operations.
DISPERSION Ideal to illuminate a work activity area.
YELLOW Ideal for snow, fog, silt, haze and dust.
BLACK Where off road lights are illegal to have exposed. This will cover them.
Second source:
• Yellow Covers To Penetrate Fog
• Blue Covers To Penetrate Snow
• Red Covers To Penetrate Dust
