Abstract: The present document describes a LED lighting module forming part of a LED lighting system comprising a troffer, the LED lighting module comprising: a mounting surface comprising a first end and a second end; light emitting diodes (LEDs) located on the mounting surface; a LED module electrical connector assembly located proximate the first end, the LED module electrical connector assembly for releasably connecting to an electrical retrofit connector assembly located proximate a first end of the troffer, the LED module electrical connector assembly for electrically connecting to the LEDs; and a LED module mechanical connector assembly located proximate the second end for releasably connecting to a mechanical connector assembly located proximate a second end of the troffer, the LED module mechanical connector assembly for releasably and mechanically connecting the LED lighting module to the troffer.