I'm worried... max dark time?

Due to utility work, the power has been fucked with for 3 days now.... I thought it better to give them solid dark time than flipping back and forth whenever. I read people do 3 day dark periods sometimes to richen up their buds, so I wasn't real worried. But guess what, the work is still going on.......

What is the max amount of time they can be in solid darkness? I'v checked on them, there isn't any drooping or signs of stress, but how long do I let this go on before I find a remedy? They are a little over a month into flowering, and they flowered quicker than usual because the clones were from mothers that had just started to flower. (It was cool, I vegged for about a month, and in 3 days of 12/12, I had buds!)

The main problem with extended dark periods is that the plant get all lanky and the tissue will be paper thin, the growth will be easy to shock or burn after 48 hours they recover, 3-5 days you will lose vigor and like lose the plant. try to give a little light or sunlight