Ive got 4 jars of naptha with dmt in it that I just extracted , I plan on freeze precipitating it in afew hours , is it ok to leave them in a dark spot for 8 hours max or will the dmt degrade

Yea it should be fine. It you haven't reduced the volume of naphtha yet you could leave the jars out and open so the solution is more saturated and precips faster once you pop it in the freezer.