Control any electrical device that is switched on/off. RelayRunner is the perfect timing software to control hydroponics, relays, solenoids, or lights from a computer. Simple, easy-to-use interface enables the PC to connect to the outside world using a wide variety of Industry Standard Relay Cards or LPT/Parallel port relay cards or the X10 Firecracker Module. RelayRunner features include day of week, 6 times each day, cyclic within a time range, top/mid/tail of hour, manual, invert, even/odd, auto-resume on power failure, stop/shutdown on signal, logging. Great for lighting displays, agricultural and hydroponics systems, greenhouses, and anything you can imagine that performs through switched electric power. The common uses are Christmas light displays, model train displays, landscape lighting, greenhouses, and hydroponics systems. The uses are only limited by a person's imagination.