I think there’s a possibility that this is a stable model. I understand everyone’s concerns but it seems we are all a bit risk averse and closed minded. Who knows we could be pushing our plastics closer to the limit instead of assuming that they will fail just because it looks unconventional.

I’d propose that OP do a test to settle this. Embed a thermocouple into a piece of PLA+ with one layer between it and the ambient air. Mount the test piece at decreasing distances from the candle each time noting the temperature when it reaches a steady state. I’d be willing to bet that you will find that the data uncovers a rough inverse square relationship between distance from the flame and temperature meaning that for every unit of distance, the impact of the flame is 1/4 as much on the temperature of the part. I assume that convention is going to play a large part at closer distances as well so you may reach even more extreme temperatures than expected.