The Al Rajhi Grand Mosque in Riyadh stands as a modern icon in mosque architecture, blending classical forms with contemporary expression. Lighting design by White Ink and architectural direction from Abdul Muhsin Al Dhyab bring a refined spiritual ambiance through the thoughtful use of warm color temperatures. Warm lighting at 2700 K is applied to highlight gold textures — the ornate domes, calligraphic embellishments, and decorative surfaces — enhancing the richness and depth of architectural detail. Meanwhile, interior volumes and central spaces transition to a slightly brighter 3000 K to ensure clarity and comfort for worshippers, maintaining legibility without overwhelming contrast. The influence of Abdul Muhsin Al Dhiab’s design manifests in how light gently washes façade elements, minarets, and porticos—each surface receiving balanced illumination that emphasizes form and proportion. Light becomes a medium to guide orientation and spiritual focus, reinforcing the mosque’s identity day into night. Optics are selected for minimal glare and smooth gradients, merging functional requirements with an aesthetic that speaks to reverence. ViaLighting’s contribution lies in supplying high-quality LED modules, precision optics, and control systems calibrated to preserve color fidelity, longevity, and energy efficiency. The result is a luminous sanctuary that respects architectural intent, elevates worship ambiance, and honors Saudi Arabia’s evolving tradition in mosque design.