I've read a number of times about lighting failure or timer failure. I was wondering if there is some sort of photosensitive wireless alarm setup for this. There's some nice ones for temp and humidity which I would use for the same reason. Considering how quickly things can go wrong in an indoor grow and specifically in hydroponics I thought it would be good to get wireless warnings. This way you would know immediately if the lights are off or on when they shouldn't be.