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Re:I bought some awful light bulbs so you don't have to by lifthrasiir on Thursday February 25, 2016 @03:56AM (#11173203)
The JavaScript code linked suggests that it indeed uses 19 levels of brightness and 256 levels of (rotated) hue. [1]

[1] https://github.com/mwittig/node-milight-promise/blob/c52d3e4...

Re:I bought some awful light bulbs so you don't have to by lucaspiller on Friday February 26, 2016 @05:21AM (#11180702)
This is correct, if you want to use these for mood lighting you probably also want RGB+saturation as the effect will be much nice. For a cheap bulb that can be controlled programatically these are great though.