AN LED CONTROLLER

An LED controller (302), for connecting to an LED string (304), comprising: an input terminal (308) configured to receive a light-control-signal representative of a received-profile-identifier; a local memory (310) configured to store a plurality of profile-data, wherein each of the plurality of profile-data defines an association between a plurality of light-values and a plurality of sequence-numbers; a processor (312) configured to: determine one of the plurality of profile-data as selected-profile-data in accordance with the received-profile identifier; and determine a set of LED control signals for the LED string (304) in accordance with light-values of the selected-profile-data for a set of sequence-numbers.