You painted a wall a warm beige, but under your new bulbs it looks gray. Or your makeup looks perfect at home and wrong outside. The culprit is usually CRI, the color rendering index. This guide explains what CRI is, why cheap bulbs distort color, and how to choose bulbs that show colors accurately. You will learn exactly which number to look for and when it truly matters.

What CRI actually tells you

CRI is a score from 0 to 100 that measures how faithfully a light source shows colors compared to natural daylight or a reference. A score of 100 means colors look as true as they do in daylight. Lower scores mean some colors get muted, shifted, or flattened. It is separate from both brightness (lumens) and warmth (Kelvin). A bulb can be warm, bright, and still render color poorly.

As a practical benchmark, 80 CRI is considered acceptable for general home use, while 90 and above is preferred where color accuracy matters. The jump from 80 to 90 is often visible, especially in reds and skin tones, which many lower-CRI bulbs render weakly.

Why cheap bulbs get color wrong

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