I am trying to update some old light switches but confused about the new switches I bought to replace them. Currently the old switches have two black and two white wires but the new switch I have only has 3 terminals. Photos of both switches are here http://ift.tt/2DH5qbK Are the new switches compatible? Do need to pigtail the wires? Any help would be greatly appreciated. via /r/DIY http://ift.tt/2DHgwNU
