Shape of color temperature curve

[jarpatus]

If I got this right then color temperature curve used by this component looks like half sine wave (max. color temperature reacher only for a short period of time). Any change this could be controlled somehow? I would like color temperature curve to look more like brightness curve looks like (kind of square wave with smoothened rise and fall). Perhaps adding optional configuration options like rise time and fall time?

For background info; I am ATM using flux component and hacked functionality like this into it (actually I set dawn, sunrise, sunset and dusk times and color temperatures and color temperature will only change between dawn-sunrise and sunset-dusk). I have found this to be superior compared to out-of-the-box flux and if I got this right out-of-the-box adaptive-lighting. I live in northern countries and during winter I get very little real sunlight so this may affect on one's experience what is good curve and what is not.

I thought about creating pull request for my flux modifications but looks like this adaptive-lighting is superior in every way so ditched the idea...

[basnijholt]

What you suggest seems reasonable. Could you share your flux edits somewhere such that I can take a look at the code?

Perhaps adding optional configuration options like rise time and fall time

This isn't possible now, but I will consider doing this.

[jarpatus]

My customized flux can be found from:

https://github.com/jarpatus/flux-2

Disclaimer: I am no python developer nor home assistant developer, so take this with grain of salt.

[jd1900]

This would be great.
Maybe set a time frame in which temperature is not affected (for instance from sunrise to 1 hour before sunset).
Afterall, talking about circadian rithms, once sun has risen, it doesn't make sense to don't have a cold/blue light once sun has risen. It doesn't have to be gradually increased.

My proposal would be to have a few time ranges where you can set the start and end time.

• TRANSIENT TO DAY LIGHT. From warm to cold. For instance, you can set to zero this transient to day light, thus making it instant, or define it.
• DAY LIGHT. During this period colour temperature and brightness remain equal, no changes are made.
• TRANSIENT TO DAY LIGHT: Same as transient to day light but from cold to warm.
• NIGHT LIGHT: Same as day light. During this period colour temperature and brightness remain equal, no changes are made.

[euinor]

More control over the color and temperature curves would be great.
My use case is that in winter I don't want to follow sunrise/sunset. I would rather my circadian rhythm followed a standard working day (100% blue and bright 9am till 5.30) even though it gets dark before 5.30.

[RubenKelevra]

Hey @jarpatus, @jd1900, @euinor,

I feel like that's a duplicate of #100 and #131 - do you agree?

[jarpatus]

@RubenKelevra at least #100, if implemented, would be superset of this one (if you can manually set color temperatures for each start times so you can shape your curve as you wish). So yeah I agree!