The simpler version of this is Philips Warm Glow in the US, generically known as 'warm dim', where the lamp has two LED engines - one bright and cold, one dimme

The simpler version of this is Philips Warm Glow in the US, generically known as 'warm dim', where the lamp has two LED engines - one bright and cold, one dimmer and warm, and it crossfades between them when the lamp is dimmed. Works great. I use it for every lamp in my house.