Thanks for that bbqkees, I'll give it a try.

Is this transition time possible via the API ?
Yes, you can find it here:
http://www.developers.meethue.com/documentation/lights-api


transitiontime uint16
The duration of the transition from the light’s current state to the new state. This is given as a multiple of 100ms and defaults to 4 ...

Thanks for adding Hue support. I've just downloaded Domoticz to try it out, and all works well, great :)

One thing I'm missing though is the 'transitiontime' argument, is there a way to accomplish this (via the interface of LUA)? As it's my first day working with Domoticz I'm very unfamiliar with ...