You can put them in the fixture or the switch box, wherever the neutral is, so it is hard wired. Here is my post about my basement: Need recommendations for unfinished basement lighting - #18 by jtp10181
Here is the thread about the bypass modules, if you go down a few posts someone shows their home made solutions. Looks like some people are talking about using them WITH neutral for low loads, and others for no neutral so not sure if they work for both or it is a different setup. Aeotec Bypass Dimmer - Alternative
