Elements+ noise stacking

Thank you for your clarification @andrei.

Last night I was fortunate to have a real situation to test and post results. There's a night blooming cereus cactus in my front yard that came into bloom after some of Arizona's monsoon rains. It was opened sufficiently at 9:40 pm for me to have a go. I used a tripod since even the 6400 iso capture at f2.8 was one third of a second [well beyond my hand holding capabilities]. I captured a series of shots at 6400 iso and a single shot {iso 100, 13 sec, f2.8]. Certainly a down side of a single image capture in this case is 13 second exposure PLUS a camera 13 second special noise reduction so the camera is out of service 2x as long as the exposure.

The wind was blowing so the blurred orange is both out of focus and moving. If anyone wants to play with this I'll gladly post my originals.

left noise stacking of 11 images .................... right single image