[PrimaryGlobal]
interface Window {
};

interface Event {
};

dictionary EventInit {
};

partial interface Window {
                attribute EventHandler ondevicelight;
};

dictionary DeviceLightEventInit : EventInit {
    unrestricted double value;
};

[Constructor (DOMString type, optional DeviceLightEventInit eventInitDict)]
interface DeviceLightEvent : Event {
    readonly    attribute unrestricted double value;
};