Acticle 410.31 states luminares shall not be used as a raceway unless listed and marked for use as a raceway. So can I install 4 - 8' surface mount flouescent fixtures end to end and at about the halfway point drop a conduit out the side of a fixture to a surface mounted receptacle box on the wall? The outlet would not be on the same circuit as the lights. Are these fixtures ever marked/listed for use as a raceway?