Introducing performance covers. When grown outdoors, shorter days and longer nights signal some plants of a season change. These plant varieties require around 12 hours of uninterrupted darkness to stop the vegetative cycle and start and maintain the flowering cycle. Since 7sensors grow box has transparent windows it may be hard to maintain uninterrupted darkness depending on a location of the grow box in relation to windows and other light sources as well as the time of day one chooses for the lights inside the grow box to turn on. We address this issue by easy to apply covers that make the grow box light-tight from inside and outside. Depending on the plant you grow the app will automatically notify you when it is time to apply the covers and it will automatically switch the light day cycle duration.