Which of these statements is FALSE with respect to lighting optics?

The statement about a diffuser redirecting light into parallel rays is inaccurate. A diffuser's primary function is to scatter light, producing a more uniform distribution and softer light rather than transforming it into parallel rays. Diffusers work by disrupting the coherent flow of light, which helps reduce harsh shadows and create a more even illumination across a surface.

In contrast, the other statements accurately describe aspects of lighting optics. Specular reflection is indeed utilized for precise optical control, as it allows for directionally focused beams of light, making it vital in applications like spotlights. A lens controls light by bending it due to the changes in the refractive index of materials, effectively focusing or spreading the light as desired. Baffles are designed to absorb unnecessary light, thus minimizing glare or unwanted reflections, contributing to a clearer visual environment. Each of these principles plays a vital role in effective lighting design and application.