Oracle 40W Series 4 Yellow VEGA Series Lens Covers (Snap Fit)Vega's optional interchangeable lens covers can be added or removed without tools to easily change the color of the light output to Yellow. These covers simply snap on over the existing clear lens to provide color enhanced light output optimized for fog or snow conditions where glare can be an issue. Made from high quality Polycarbonate, these rugged covers can quickly snap on and off without tools.