Astronomical Timer

A timer that uses your location to follow sunset and sunrise as the seasons shift.

An astronomical timer is a control built into many transformers that calculates local sunset and sunrise from your latitude, longitude, and the calendar date. Instead of firing at a fixed clock time, it tracks the changing daylight through the year, so your lights come on at dusk in June just as reliably as in December without you ever resetting them. Most models let you keep the system on until a set hour or pair it with an offset, then shut down for the night. It is the most accurate, lowest-maintenance way to schedule a landscape lighting system, and it pairs well with a photocell for a true dusk-on response.

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