Good questions, Manning6. From your assessment, it seems the LED lights would last about half as long as they would without the flicker correction. If the flickering bothers you, this may be a reasonable trade-off.
My ex has epilepsy. One year we both fell into the Christmas Tree as she had a seizure and I tried to catch her. I would suggest that the makers of AC LED lighting be very careful about flickering. Flickering lights can be a trigger for epileptic seizures.
Without researching the issue I'd guess that LEDs have a sharper on/off brightness response than a heated wire does.
On another note, I've taken night shots at the drag races; the ones where I slow the exposure and follow the cars have clear car images, blurred stationary stuff (fences and guard rails for instance), and stretched out multi-pulsed images of the high wattage track lights... The first time I saw it it was a surprise.
I agree with D Sherman. In my household I am the only one who deals with electrical Christmas decorations so I was not concerned. Using the slavaged plug from a scrapped string of mini lights will give 3 amp protection for most erroneously pluged in devices. Plugging in a string of incandescent mini lights will not be a problem. I have done this and they work OK.
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Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.