The starting point
For a CMY moving head, evaluate the colours and transitions you actually need at the intended zoom and dimming levels. Check whether a separate colour wheel or correction filters are also used. A CMY feature label does not establish colour matching, saturated-colour output or the behaviour of every cue.
Identify the actual colour system
In a typical white-source fixture with subtractive CMY mixing, cyan, magenta and yellow filters remove parts of the source spectrum to create colours. Additive LED mixing uses a different approach, combining light from emitters. Product terminology can blur these distinctions, so ask which mechanism the exact model uses and which functions appear in its channel chart.
A fixture may also have a fixed colour wheel, correction filters or other optical functions. List these separately. The available colours and the route between them matter when the design needs a smooth fade, a repeatable white point or a particular saturated look.
Test the transitions, not only the endpoints
Choose a short cue sequence that represents your work: a pastel, a saturated colour, a white look and a slow transition between them. Run it at the intended zoom and working distance. Look for unwanted changes during the transition, visible differences across the beam and the low-level behaviour you need for the show.
Repeat the sequence on more than one unit when fleet consistency matters. Keep the selected dimming curve, colour settings, firmware and console profile in the record. A photograph of a colour endpoint does not establish how the transition behaves or whether another unit will reproduce it.
Keep output and colour evaluation together
Filtering changes the light reaching the target, so do not assume the white-light illuminance figure describes every mixed colour. Ask for a demonstration of the colours that matter to your production. Keep distance, zoom, dimming and exposure consistent when recording the comparison.
The useful result also depends on the source spectrum and optics. A fixture with a CMY system is not automatically equivalent to another CMY fixture. If you need to match an existing fleet, test the combined look on the actual target rather than relying on matching channel values or colour names.
Make colour requirements part of the brief
For camera work, assess the result with the intended camera and recording settings. For theatre, inspect the illuminated scenery, costumes and people in the room. Different evaluation conditions answer different questions; retain them alongside the accepted sample record.
- The specific white looks, pastels and saturated colours required.
- The slow fades and transitions that must remain smooth.
- The intended zoom, throw distance and dimming levels.
- Camera settings and the target materials or people being illuminated.
- Existing fixtures that the new equipment needs to match.
- Any colour wheel, correction filter or console-setting dependencies.
Ask YL a model-specific colour question
Send the model shortlist and a description of the colour looks and cue transitions you need. Identify the existing stock and console, if any. Ask which colour functions the model supports and which settings should be used in a demonstration. The aim is an agreed, reproducible result rather than selecting a product solely because the title contains CMY.
Common questions
Does a coloured product photograph prove that a fixture uses CMY?
No. Different colour mechanisms can create coloured output. Check the exact model’s optical description and channel chart.
Will identical CMY values match every fixture?
Do not assume that they will. Source, filters, optics, calibration and settings can differ. Test the fixtures together under the intended conditions.
Ready to apply this to your project? Share the model shortlist and the details you have gathered.
