I have bulbs for which the brightness and color temperature can be controlled. I’ve bought some four-button switches to control brightness and temperature independently, but it feels too complicated to be magic. I want a way to control both brightness and temp – in an intelligent way. By control I mean increment/decrement at the same time so that I could use a two-button switch (like the RODRET).
I understand that Philips has a line of (non-smart?) bulbs that does this. I can’t find any HA blueprints that do this, or any discussion.
I’m happy building it myself, but I don’t know where to start (algorithm-wise).
Let’s convert the brightness scale (e.g., 0-255) to % and the color temp scale (e.g., 2700 - 5500) to % to keep things simple. It doesn’t seem like “matching” the two attributes would feel the best. E.g. when you’re at 10% brightness you’re at 10% color (2980 in my example) and when you’re at 100% brightness you’re at 100% color (e.g., 5500).
My inclination is that if I want reduced brightness then I want a warmer temp. Also warm temps just don’t “feel” bright. So with my 4-button remote I’ve found that I tend to increase the brightness to max, and then need “more light” so then start increasing the temp.
Instead it feels like you should slowly ramp up the color when you’re ramping up the brightness then when you’re at, say, 80% brightness then you ramp the color up more quickly, and then keep increasing the color after you get to 100% brightness.
E.g., As you go from 0% - 70% brightness you ramp up the color from 0% to 30%. From 70% to 100% brightness you ramp up the color from 30% to 70%. Then you keep ramping up.
Has anybody thought through this? Does anybody know how the Philips bulbs do it?
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