What can I do with an RGB Bulb?

[tom_l]

Also here’s a post on changing the colour based on a sensor value:

Temperature to RGB light?

Using the HSB (hue/saturation/brightness) colour space makes it easy to map a temperature range to a hue, keeping the saturation and brightness constant. e.g. starting at a hue of 180° on the wheel and heading up to 360° with an equation if you don’t mind cyan = cold, red = hot and blue/purple representing a middle temperature. Or going the other way round the hue wheel, blue, cyan, green, yellow, orange, red (cold → hot), which I find better. e.g. this maps 16°C → 24°C to blue, cyan, green, y…