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# Colour temperature

> The warmth or coolness of white light, measured in kelvin (K); daylight is about 5500–5600 K.

Also known as: color temperature, CCT, kelvin. Category: Lighting and optics.

Colour temperature describes the hue of white light in kelvin (K): lower values are warmer (orange), higher values cooler (blue). Studio lights for product photography are usually daylight-balanced, around 5500 to 5600 K, and all lights in a set-up should match.

## How PhotoRobot uses it

Some DMX-controlled lights used with PhotoRobot allow colour temperature to be set from PhotoRobot Controls. PhotoRobot notes that Broncolor Siros S strobes keep their colour stable when flash intensity changes, which avoids recalibrating colour when light settings change.

## Related terms

- [White balance](https://www.photorobot.com/glossary/white-balance): Adjusting an image so neutral whites and greys show no colour cast under the given light.
- [CRI (colour rendering index)](https://www.photorobot.com/glossary/cri): A 0–100 score of how faithfully a light source reproduces colours compared with a reference light.
- [Continuous light](https://www.photorobot.com/glossary/continuous-light): Lighting that stays on constantly, typically LED, so the effect is visible before shooting.
- [Colour calibration](https://www.photorobot.com/glossary#colour-calibration): Adjusting cameras, lights and screens to a reference so colours are reproduced consistently.

## Where this term appears on photorobot.com

Mentioned on 8 pages. Most relevant:

- [FOMEI LED ROLL - PhotoRobot User and Controls Guide](https://www.photorobot.com/manuals/fomei-led-roll): LED ROLL 62 DMX Specifications Power 62W LUX 0.5m / 6940, 1m / 2470, 2m / 668 Color Temperature 5600K Voltage AC 15V / 5A, DC 14.4V Dimensions 61 x 46 x 0.3cm Weight 0.5kg CRI 95 LED Diodes 504 pcs…
- [FOMEI LED DMX 150B Studio Light - PhotoRobot User Guide](https://www.photorobot.com/manuals/fomei-led-dmx-150b): The light itself offers a maximum power of 150W, and a color temperature of 5600K.
- [FOMEI LED DMX 600B Studio Light - PhotoRobot User Guide](https://www.photorobot.com/manuals/fomei-led-dmx-600b): The FOMEI LED DMX 600B is a professional studio light with a maximum output of 600W / 5600K, suitable for professional studio use for video and photography.
- [FOMEI LED DMX 300B Studio Light - PhotoRobot User Guide](https://www.photorobot.com/manuals/fomei-led-dmx-300b): From the main menu, there are menu items for: CCT Mode (Intensity), Scene Mode, Channel and Fan (Cooling) Setting, and BT (Bluetooth) Reset & ID.
- [Broncolor Siros 800 S WiFi / RFS 2 Operating Instructions](https://www.photorobot.com/manuals/broncolor-siros-800-s-operating-instructions): …Hz) 0.08–2.9 s Flash energy adjustment Over 9 f-stops, in 1/10 or full-stop increments Color temperature 800 J / WS ECTC technology Constant color temperature across the power range.
- [Capturing Images with PhotoRobot - User Support Manual](https://www.photorobot.com/manuals/capturing-images): Note: Some DMX-controlled lights also provide control over color temperature.
- [360° Product Photography - Content Formats and Production](https://www.photorobot.com/blog/360-product-photography): Beyond adjusting intensity, some DMX-controlled lights also provide control over color temperature.
- [Packshot Photography - What is it, and How to Produce It](https://www.photorobot.com/blog/packshot-photography): Nor is capturing texture, or working with white balance and color temperature.