Electrical timers allow gardeners to set many of their systems to run automatically, ensuring a more consistent schedule. Lights, fans, heaters, and watering systems can all be programmed to operate at specific times or intervals. A proper light cycle is vital to good plant growth, and incorporating electrical timers into the lighting system will guarantee the plants receive the ideal amounts of light and dark. Timers can be also be set to move lights along rails or set up automatic drip systems.