The detailed description below discloses examples of printed circuit boards for use in lighting systems or the like
. Such a board has a number of identical LED writing board landing zones printed on the board. Each LED landing zone includes two sets of LEDcontact pads. One of the sets of contact pads is configured to mate with a first contact configuration for an LED of a first structural type. The other set of contact pads is configured to mate with a second contact configuration for an LED of a secondstructural type different from the first structural type, that is to say, of a type having a second contact configuration that is different from the first contact configuration.