Sidehistorik
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At some point, ZenseHome added MQTT support for their system, so I created this:
Solution 1
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Pressing the Switch send a signal over 220V cable to the ZenseHome box, that post a message on a MQTT Tpoic, that Home Assistent picks up, and sends a toogle to the Hue Brige, that informs the Lamp over ZigBee..
Worked ok 
Solution 2
Later I introduced Node-RED:
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This we started seeing som smaller periods, where the light would not work for some 1 minute... I was thinking that Node-RED or Home Assistant may be hanging due to Ressouces on the Laptop running it.
Solution 3
So I simplified - at this Time ZenseHome has introduced Philips Hue support:
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