Is hue_event triggered by state of bulb changes?

I have non-connected switches and I would like to set an ambient light according to some conditions ; so I trigger an automation on state of bulb changes (anything to on) but this change take up to 5" to come (as it was before hue_event to be implemented.

So my question : is hue_event also triggered by state of bulb changes or only triggered by state of switch changes ?

(I have an Hue bridge v2)