The LEIT 4000 is a self-contained, water management irrigation controller that harnesses ambient light (solar) as a power source. The controller’s easy-to-navigate features include four independent programs with three start times for each valve, password-protected entry, monthly budgeting up to 200 percent, rain stop up to 99 days with automatic restart, manual run via the program or valve, and status reports including current and past month’s information for each valve. A compact design and time-tested photovoltaic module harnesses ambient light energy to power the unit day and night in any kind of weather conditions.