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Yes the ones I've printed so far are in PLA (at 220 degrees ) the 48c was before I assembled the lamp I had it running for about an hour and that temp was the max temp the LED heat sink stars got to. I wanted to make sure the LEDs wouldn't get to a dangerous temperature and cause a fire. They seem to be fine. I've them running all day with no problems. ( I do turn them off when I leave the house though just to be sure)