Anybody with any experience of this range of accessory care to shed any light ( no pun intended ) on it for me. Basically i have just completed a large 1st fix extension, and my customer has now told me thet intend on using the lightwave range. Ive had a quick look whilst i was on site as my first concerns were that i would maybe have to alter some wiring but it seems as though they are compatible with conventional wiring. Is there anything i need to consider or should no before i start to 2nd fix this stuff? I have an intermediate switch at the top of a staircase and i cant see that they have one within there range. Any help much appreciated.