Last Updated 16 minutes ago
Filmmaking Dictionary: Number 2 / 2700K Colour Temperature
Definition
2700K describes a warm colour temperature commonly associated with domestic incandescent-style lighting. For an LED or other non-thermal source, it is normally a correlated colour temperature: a description of the light’s general white appearance, not the physical temperature of the fixture.
The value is written in kelvin, without a degree symbol. Compared with 3200K or 5600K, 2700K is a warmer-looking source when viewed under the same conditions and camera white balance.
What It Looks Like on Camera
The camera’s white-balance setting changes how the source is rendered. A 2700K lamp photographed with a daylight balance generally appears warm. Balancing closer to that lamp can make it look more neutral while making daylight elsewhere in the frame appear cooler.
For example, a bedroom scene may use warm bedside lamps against cooler window light. The relationship between the two sources and the chosen white balance creates the contrast. The bulb’s printed Kelvin value alone does not determine the finished colour.
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Matching a Practical Lamp
When a visible practical motivates a larger off-camera light, matching both to a nominal 2700K is a useful starting point. It is not a complete match. Sources can differ in green-magenta tint and spectral output, producing different skin tones or fabric colours despite similar CCT readings.
Test the lamps together through the intended camera and viewing transform. Adjust the supporting fixture or filtration based on the actual picture. A colour meter can help describe the mismatch, but the recorded scene remains the practical test.
Checks for Production
- Colour: Compare CCT and tint rather than relying only on packaging.
- Dimming: Check whether the lamp’s colour changes as output is reduced.
- Flicker: Test the actual dimmer setting and camera exposure time.
- Consistency: Keep track of bulb models and replacements used across matching scenes.
- Exposure: Balance the practical’s visible brightness with its contribution to the scene.
Common Mistakes
- Calling 2700K a brightness rating.
- Assuming two different LED bulbs at 2700K will reproduce colours identically.
- Changing the camera’s white balance without considering every other source in the frame.
- Expecting all dimmable LEDs to warm up like dimmed tungsten.
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Frequently Asked Questions
Is 2700K the same as tungsten balance?
Not usually. Cinematography commonly uses 3200K as a tungsten reference, while many domestic lamps are warmer.
Does a 2700K fixture have to look orange?
No. Its appearance depends on white balance, other light sources and the final colour treatment.
Related Terms
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