Wiring boards for array-based electronic devices

A lighting system comprising:

• a substantially planar lightsheet;
• disposed on the lightsheet, first and second spaced-apart power conductors each extending in a first direction;
• a plurality of light-emitting strings, each light-emitting string (i) comprising a plurality of interconnected light-emitting elements spaced along the light-emitting string, (ii) having a first end electrically coupled to the first power conductor, (iii) having a second end electrically coupled to the second power conductor, and (iv) being oriented in a second direction not parallel to the first direction, wherein the power conductors supply power to each of the light-emitting strings;
• and
• a plurality of control elements each (i) electrically connected to at least one light-emitting string and (ii) configured to utilize power supplied from the power conductors to control the current to the at least one light-emitting string to which it is electrically connected,
• wherein, for each light-emitting string, a pitch at which the light-emitting elements are spaced is (i) substantially constant and (ii) independent of a position of the control element electrically connected to the light-emitting string.