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An architectural learning and wellness space transitioning from cool daylight to warm evening light
Circadian Rhythm Control · Human Centric Lighting

Light that moves
with the day.

Bring the changing character of natural daylight indoors with scheduled tunable-white lighting—supporting visual comfort, focus and a calmer transition into the evening.

Why dynamic white?

Fixed white light ignores the rhythm of the day.

Natural daylight changes in both intensity and colour appearance. Circadian Rhythm Control coordinates compatible tunable-white lighting to create a planned indoor light journey instead of one unchanging scene.

FIXED WHITE LIGHTING

One setting.
All day.

Colour appearance remains unchanged even when the time, activity and natural-light conditions have moved on.

CIRCADIAN RHYTHM CONTROL

A lighting character that changes with the day.

Warm startCool active periodWarm finish
01 · PLAN

Define the daily curve

Choose the times and lighting character required for the people and activities in the space.

02 · CONTROL

Schedule the transitions

Koolmesh commissioning coordinates gradual changes without repeated manual adjustment.

03 · EXPERIENCE

Tunable white, throughout the day

Compatible luminaires shift colour temperature and light level to suit the intended daily sequence.

Conceptual control path. Available ranges, interfaces and commissioning options depend on the selected Hytronik product, luminaire, driver and project configuration.

Application example and settings

One day. Four purposeful lighting moments.

A scheduled curve can create brighter, cooler light during active periods and warmer, softer light later in the day—while transitions remain gradual.

07:00Morning 12:00Midday 18:00Evening 21:00Night
Cool morning lighting scene at 7:00

Cool and energising

Illustrative: 5000–6500 K

A bright morning scene can help the space feel alert, fresh and ready for active work or learning.

Balanced midday lighting scene

Bright and balanced

Illustrative: 4000–5000 K

A balanced neutral-white scene supports visually demanding tasks without making the atmosphere feel harsh.

Warm evening lighting scene at 18:00

Warm and softer

Illustrative: 2700–3000 K

Warmer light creates a more relaxed character as work winds down and evening activity begins.

Dim warm night lighting scene at 21:00

Dim and warm

Illustrative: around 2200 K

A low, warm scene reduces visual stimulation where a calm late-evening atmosphere is appropriate.

These times and colour temperatures are examples, not universal recommendations. Final settings must reflect the supported luminaire range, required illuminance, local guidance, user needs, operating hours and on-site commissioning.

Koolmesh App default circadian profiles for office and healthcare applications
Brightness + colour temperature

The curve controls two lighting dimensions—not colour alone.

These Koolmesh App profile examples show how brightness and colour temperature can follow different daily paths for office and healthcare settings.

They are example profiles rather than universal project settings. Confirm available ranges and final values during product selection and commissioning.

Four key functions

From a lighting idea to a repeatable daily experience.

The value is not a single colour temperature. It is the ability to plan, commission and repeat an appropriate sequence for each space.

01 · DYNAMIC SCHEDULING

Change scenes automatically

Move from cooler active light to warmer evening light according to the project’s daily operating pattern.

ONE CONNECTED LIGHTING JOURNEY
DAILY
LIGHT
CURVE

Plan. Control. Repeat.

Scheduling, tunable-white output, commissioning and custom curves work together to create the intended experience.

02 · TUNABLE-WHITE OUTPUT

Coordinate colour and brightness

Control compatible lighting so colour appearance and light level work together as part of one planned scene.

03 · KOOLMESH APP

Commission without complex software

Create and adjust lighting behaviour through the Koolmesh App where supported by the selected device and system design.

04 · FLEXIBLE CURVES

Adapt the journey to the space

Use an appropriate curve as a starting point, then refine timing and output for occupancy, activities and project requirements.

Where it adds value

Designed for places where people spend long hours indoors.

The most useful curve depends on the space, the activity and how occupants use it—not simply the time shown on a clock.

Bright contemporary office with balanced daytime tunable-white lighting
01 · OFFICES

Support the working day

Create an active daytime atmosphere and a softer visual transition for late working hours.

Modern classroom with comfortable neutral-cool lighting
02 · CLASSROOMS

Match learning activities

Use scheduled scenes for focused lessons, collaborative work and calmer periods.

Healthcare patient room with warm early-evening lighting
03 · HEALTHCARE

Create gentler day–night cues

Plan comfortable changes for spaces operating beyond conventional daytime hours.

Wellness studio with warm evening lighting and blue-hour daylight
04 · WELLNESS & GYMS

Shift with the activity

Move from an energetic training atmosphere toward warmer, more restorative experiences.

Need help shaping the right daily light journey?

Talk to a Hytronik specialist about the tunable-white luminaire range, control interface, operating schedule and commissioning approach required for your project.