Just don't let it happen too often. Get her back on schedule. When you say 2 nights you mean when they were supposed to go dark the lights stayed on? So 48 hours of light? Im sure its a little shock to her. She may take another week or so of 12/12 to get back on track of flowering. Im not 100% sure but someone with a little more knowledge than I about that situation will answer soon enough Im sure.
You should be fine since they were only t5's ( rather than a powerful HPS ) but lesson learned. Even timers aren't foolproof, manual checking daily is a good backup ( of course, maybe you were away ).
yeah its my 2nd woods digital timer that just stuck on. I guess im lucky that it was only my side lighting, I just don't want to mess up my crop again....