CRI (Colour Rendering Index) measures how accurately a light source renders colours relative to natural daylight, on a scale of 0–100. CRI 90 means colours are rendered with high accuracy. For office work, CRI 90 matters in two specific contexts: on-camera appearance during video calls (accurate skin tone rendering), and any work requiring colour discrimination or visual accuracy (design, review, presentation preparation). Standard office fluorescent or LED lighting is typically CRI 70–80; HIGHKA’s Osram LED specification at CRI 90 represents a meaningfully higher standard within the pod environment.