I bought a few of those as well - took me quite a while to figure it out, with a whole lot of trial and error and waiting. But even after I got them working, I didnt really trust them too much for some reason.........then I came across a digital outdoor timer at home depot for like 20 bucks. Its absolutely perfect - It's deadly accurate, you can plug in two three plong plugs and can set it quite easily. It is definitely the only way I would go if I did it again.........