Light switch (UK)

yes on the other product that is another output hence why you can’t do it the way you think and why i said

there are ways for you to do 2 way with this but they are not simple, this product is designed to work mostly as a 1 way switch with secondary control though the app or another zwave device. i suspect you want something like this.

https://www.amazon.co.uk/Fibaro-FGD-212-250-Universal-Dimmer/dp/B012X0I8JY/ref=sr_1_1?ie=UTF8&qid=1518449621&sr=8-1&keywords=fibaro+dimmer&dpID=413P-epphIL&preST=_SY300_QL70_&dpSrc=srch

but it does depend on what you are trying to achieve