You must order a Base Module lens if you purchase a Diffuser sub-lens. Spot Base Modules can be ordered here.
The LED color will have a small effect on the illumination pattern, e.g., lenses used with non-white LEDs will produce a narrower beam of light.
All L2 lenses are made of optical grade PMMA (acrylics) to ensure excellent optical properties as well as long-term material stability and durability and have an optical efficiency of at least 85%.