CRI indicates how faithfully a light source lets us see colours compared with a reference source. The closer the value is to 100, the more natural wood, textiles, food, decoration and skin tones usually appear.
Two bulbs can have the same colour temperature and the same lumen output yet make a room look different if their colour rendering is not the same.
What CRI means
CRI stands for Color Rendering Index. The result is expressed on a scale with a maximum value of 100. It does not measure how much light there is or whether the light is warm or cool; it describes how accurately certain colours are rendered under that source.
Difference between CRI 80, 90 and 95
| Value | Indicative use |
|---|---|
| CRI 80+ | Suitable for general domestic lighting |
| CRI 90+ | More natural colours; useful for dining rooms, dressing areas, reading and decoration |
| CRI 95+ | High colour fidelity for photography, art, make-up or demanding colour work |
A higher number is not always essential. For low ambient light, a good standard CRI may be enough, while in places where you choose clothes, cook or work with colour, a higher value matters more.
How CRI affects decoration
With limited colour rendering, some colours can look dull, too similar or unnatural. Warm wood may lose nuance and beige fabric can appear greyer.
This matters particularly with designer lighting because the lamp does more than provide light: it also affects how surrounding materials and colours are perceived.
Why kelvin is not enough
Kelvin describes the overall colour of the light. CRI describes how that light renders colours. A 2700K bulb with low CRI can look less pleasant than another 2700K bulb with better colour rendering.
The real spectrum of the bulb, the diffusion of the shade and the colours in the room also matter. That is why two products labelled 2700K do not always look identical.
Where a high CRI is especially useful
- Dining room and kitchen: so food retains a natural appearance.
- Dressing area: to distinguish clothes and combinations correctly.
- Bathroom and vanity: when the light is used for make-up.
- Art and photography: for more accurate colour perception.
- Living room: where textiles, wood and decorative objects have important nuances.
- Retail displays: to present products more accurately.
What else to check besides CRI
- R9: an additional value related to saturated reds, when published by the manufacturer.
- Kelvin: whether the light is warm, neutral or cool.
- Lumens: the amount of light.
- Flicker: stability of the light source.
- Dimming: compatibility with dimmable systems.
- Bulb shape: affects distribution and whether it fits inside the shade.
How to choose for a table lamp
For an ambient lamp, a 2700K bulb with CRI 80 or above can work well. When the lamp also lights a reading corner, a side table with decorative objects or an area where colour accuracy matters, CRI 90 or above can be useful.
Before buying, check the socket, lumen output and maximum permitted wattage. Our guide to choosing an E27 bulb for a table lamp brings those factors together.
Frequently asked questions
Is CRI 80 bad?
No. It is a common and valid level for general lighting. Whether you need more depends on the use.
Does CRI 100 exist?
Some reference sources reach or approach 100, but domestic LED bulbs are more commonly rated at 80, 90 or 95.
Does a high CRI use more electricity?
There is no simple direct relationship. Efficient bulbs with good colour rendering exist. Always compare lumen output and watts.
Does CRI change the colour temperature?
No. Whether light is warm or cool is described by kelvin, although spectral quality affects the final appearance.
Good colour rendering is especially valuable in decorative spaces. Explore our table lamps to see different finishes and forms under warm light.