Well, I couldn't wait until after Easter....I believe the flickering was caused (mostly), by the way I was wicking the testers! Instead of pushing the wick down far into the candle, I was using approximately 2" pieces. Even though the wick wasn't moving, it needed to be anchored more substantially. By pushing the wick down to the bottom of the candle, the flickering (strobe light effect), has diminished, at least for now!