Most professional bi-colour LED lights cover a range somewhere between warm tungsten and cool daylight, often around 2700K to 6500K. But there is no universal colour temperature range for a bi-colour light, and the numbers alone tell you surprisingly little about what the light will actually look like on camera.
Modern fixtures can extend considerably beyond the traditional tungsten and daylight reference points. Maxima Spectra and Maxima Rapida, for example, cover 2600K to 6800K. That extra range can be useful, but understanding why requires looking beyond the Kelvin number itself.
What does colour temperature actually mean?
Colour temperature describes the appearance of white light along a scale measured in Kelvin (K). Lower values appear warmer, moving towards amber and orange, while higher values appear cooler, moving towards blue.
Some familiar reference points are:
- 2600K–2800K: very warm white, similar to many domestic incandescent and decorative practical lights.
- 3200K: the traditional reference point for tungsten-balanced photographic and cinema lighting.
- 4000K–4500K: a neutral intermediate region often useful in mixed-light environments.
- 5600K: a conventional reference point for daylight-balanced photographic and cinema lighting.
- 6500K and above: increasingly cool white, useful for matching or contrasting with cooler ambient conditions.
But these numbers should be treated as reference points rather than recipes. There is nothing inherently cinematic about 3200K, and 5600K is not the colour temperature of every daylight situation.
Why are 3200K and 5600K so common?
The prominence of 3200K and 5600K comes largely from the history of photography and cinematography.
Traditional professional tungsten lamps operate around 3200K, so tungsten-balanced film stocks and later camera white-balance presets were designed around that reference. Daylight-balanced photographic systems adopted values around 5500K–5600K as a practical representation of typical daylight.
Those two numbers became so familiar that they are sometimes treated as if they describe two fixed kinds of light: indoor and outdoor.
Reality is much more interesting.
Is daylight really 5600K?
Not necessarily.
Natural daylight changes continuously according to time of day, weather, geographical location, atmosphere and whether the subject is illuminated by direct sun, open sky or reflected light.
Early and late sunlight can be considerably warmer than conventional 5600K daylight. Open shade under a blue sky can become significantly cooler. Cloud cover changes the balance again, and even the surfaces surrounding your subject can influence the light reaching them.
So when I am lighting a real location, I don’t automatically see a window and set every fixture to 5600K. I look at what the existing light is actually doing and decide whether I want to match it, neutralise it or deliberately contrast with it.
That last option is important, because matching every source is not always the goal.
Does 3200K always look warm and 6500K always look cool?
No, and this is one of the most useful concepts to understand about colour temperature.
The appearance of a light depends on the relationship between the colour temperature of the source and the white balance of the camera.
If you illuminate a subject with a 3200K source and set the camera’s white balance to approximately 3200K, that light can appear essentially neutral. If you illuminate the same subject at 5600K and set the camera accordingly, the result can again appear neutral.
The Kelvin value therefore doesn’t tell you by itself whether the finished image will look warm or cool.
Things become creatively interesting when those values are separated.
If your camera is balanced around 5600K while a practical lamp in the background sits around 2800K, that practical will appear distinctly warm. Conversely, a source with a substantially higher CCT than the camera’s white balance will appear cooler.
This relationship gives photographers and cinematographers a powerful creative tool before any colour grading takes place.
Should all the lights in a scene have the same colour temperature?
Absolutely not.
Matching colour temperatures is useful when you want multiple fixtures to behave as one coherent source or when artificial light needs to integrate invisibly with an existing environment.
But intentionally mixing colour temperatures can create depth, separation and atmosphere.
In filmmaking at Cinestudio, I often prefer a little colour contrast rather than making every source technically identical. A warmer practical somewhere in the background against a more neutral key light on the face can give an image much more depth without resorting to strongly coloured effects.
The important distinction is between mixed colour temperature by accident and mixed colour temperature by design.
A bi-colour fixture gives you control over that decision.
Why is a wider bi-colour range useful?
If 3200K and 5600K cover the two traditional reference points, why would a professional light need to extend to 2600K or 6800K?
Because real environments rarely exist at two convenient fixed values.
A wider range gives you more room to respond to existing light or deliberately move away from it.
At the warm end, values around 2600K can help integrate a fixture with very warm domestic practicals, decorative lamps and certain interior environments. They can also be used deliberately to introduce stronger warmth into part of a scene.
At the cooler end, extending beyond conventional 5600K daylight gives you additional control when working with cooler ambient light or when you want to introduce subtle cool separation between sources.
This is one of the reasons we chose a 2600K–6800K range for both Maxima Spectra and Maxima Rapida. The additional range isn’t there simply to make the specification larger. It gives photographers and filmmakers more room to decide where their artificial light should sit in relation to the environment around it.
Matching colour temperature is not the same as matching light
There is another important limitation to Kelvin values: two lights set to exactly the same colour temperature can still look different on camera.
CCT describes the approximate position of white light along a warm-to-cool scale. It does not describe the complete spectral distribution of the source.
Imagine two different LED fixtures both set to 5600K. Their white points may be similar, but one source might reproduce reds, greens and subtle skin tones much more accurately than the other because the underlying spectra are different.
This is why simply matching the Kelvin number displayed on two fixtures does not guarantee a perfect colour match.
What is the difference between colour temperature, CRI, R9 and TLCI?
These measurements describe different aspects of a light and should not be confused with one another.
Colour temperature (CCT) tells us approximately where the white point sits between warm and cool.
CRI evaluates how accurately a source reproduces a selection of colours compared with a reference illuminant.
R9 looks specifically at the reproduction of saturated red. This can be particularly relevant when photographing or filming people because accurate red reproduction contributes to natural-looking skin tones.
TLCI evaluates colour reproduction from the perspective of television and camera systems, giving filmmakers another useful indication of how a source is likely to behave when recorded.
In other words, a light can be correctly set to 5600K and still reproduce colours poorly. Correct colour temperature and good colour rendition are two different things.
If you’re particularly interested in this relationship when lighting people, our article on how professional bi-colour lights affect skin tones explores the subject in more detail.
How should you choose the right colour temperature on set?
I would start with a different question: what do you want the artificial light to do in relation to the existing light?
There are broadly three possibilities.
1. Match the existing light
If you want your artificial source to disappear naturally into the environment, set it close to the light you are trying to reproduce.
For an interview beside a window, that might mean matching the actual daylight entering the room. In an interior dominated by warm practicals, it might mean moving considerably further towards the tungsten end.
2. Create subtle separation
You might keep your key relatively neutral while allowing background practicals to remain warmer, or introduce a slightly cooler edge light to separate a subject from the environment.
The difference doesn’t need to be dramatic. A few hundred or thousand Kelvin can create enough colour contrast to help layers of the image feel distinct.
3. Use colour temperature creatively
There is no requirement for white light to appear neutral.
You may deliberately use a warmer source against a cooler camera balance, or do the opposite, simply because it creates the feeling the image requires.
Once you understand the relationship between source CCT and camera white balance, Kelvin stops being a corrective setting and becomes another part of your visual language.
Do you need a colour temperature meter?
Not necessarily, but for colour-critical professional work it can be extremely useful.
A dedicated colour meter can tell you considerably more about a source than simply looking at the image on a camera monitor. Depending on the meter, you may be able to evaluate CCT, green-magenta deviation and more detailed information about the spectral characteristics of the light.
For many everyday shoots, however, a good camera monitor, a neutral reference and experience are enough to make practical decisions.
I wouldn’t become obsessed with making every source mathematically identical unless the production requires it. The objective is not to create a technically perfect collection of Kelvin numbers. The objective is to create an image in which the colour relationships feel intentional.
How Spectra and Rapida use the bi-colour range
Both Maxima Spectra and Maxima Rapida cover a continuous 2600K–6800K range.
For us, the useful part isn’t simply having a wide range. It’s being able to move through that range while maintaining the colour quality required for professional photography and cinematography.
Spectra, for example, achieves an R9 value of 97 and a TLCI of 98, making its colour performance particularly relevant when working with people, fashion, products and other colour-critical subjects.
Rapida follows the same philosophy in a compact platform, with an R9 of 97.1 and TLCI of 98.
Both fixtures are also compatible with Profoto® and Bowens® modifier ecosystems, which means colour temperature is only one part of the creative decision. The same source can then be shaped into broad soft light, a harder reflector-based source or a much more controlled beam depending on the modifier being used.
That’s ultimately how I think about bi-colour lighting: not as a way to choose between “orange” and “blue”, but as one more dimension of control over the image.
So, what is the colour temperature range of a bi-colour light?
The simple answer is that many professional bi-colour LED fixtures cover approximately 2700K to 6500K, while some extend beyond that range. Maxima Spectra and Rapida, for example, cover 2600K to 6800K.
But the more useful answer is that the endpoints are only part of the specification.
When evaluating a professional bi-colour light, consider:
- How wide its CCT range is.
- How accurately it reaches and maintains the selected white point.
- How consistent its colour remains while dimming.
- How well it reproduces colours throughout that range.
- Its CRI, R9 and TLCI performance where available.
- How the source integrates with your modifiers and the other lights in your scene.
A good bi-colour fixture doesn’t simply give you more Kelvin values. It gives you the freedom to decide how your light relates to every other source in the image.
Want to explore bi-colour lighting in your own workflow?
If you’re choosing a light for photography, filmmaking or hybrid production and aren’t sure what output, colour range or modifier system makes sense for your work, you can talk with a Maxima lighting specialist.
Rather than simply recommending a particular fixture, we can look at the cameras, modifiers and type of work you already do and help you understand which lighting setup makes the most sense.
Frequently Asked Questions
Can I mix bi-colour LED lights with other types of lighting on the same shoot?
Yes. The lights do not necessarily need to have identical colour temperatures. Match them when you want multiple sources to behave consistently, or deliberately use different colour temperatures to create separation and atmosphere. The important thing is that the relationship between the sources is intentional.
Does a bi-colour LED maintain the same colour temperature when dimmed?
A well-designed professional LED should keep its colour point reasonably stable throughout its useful dimming range, but performance varies between fixtures. Dimming behaviour is therefore worth evaluating alongside maximum output and headline colour-rendering specifications.
Is daylight always 5600K?
No. 5600K is a useful photographic and cinematographic daylight reference, but real daylight varies considerably with time of day, weather, atmosphere, shade and reflected surroundings. A bi-colour fixture lets you respond to the actual ambient light rather than assuming daylight is always one fixed value.
Do I need different diffusion for warm and cool colour temperatures?
No. Colour temperature does not determine whether a light is hard or soft. Softness primarily depends on the apparent size of the source relative to the subject. Choose diffusion and modifiers according to the light quality you want rather than the Kelvin setting.
Should all lights in a scene be set to the same Kelvin value?
Not necessarily. Matching sources can be useful for technical consistency, but deliberately mixing colour temperatures is a common creative technique in photography and cinematography. A warmer background practical and a more neutral key light, for example, can create natural colour separation and depth.
What should I compare besides colour temperature when choosing a bi-colour LED?
Look at colour rendition, R9 and TLCI where available, dimming consistency, output, optical behaviour, cooling noise and modifier compatibility. Two fixtures with identical colour-temperature ranges can perform very differently because CCT describes only one aspect of the light they produce.
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- What is the difference between bi-colour and tungsten lighting?
