I wonder how cheap you could put accelerometer (or pressure sensor) on this, so it would flutter and flare when moved or blown on.
It would probably be easier with a simple thermistor to detect a good breeze.
I've seen it done this way. Personally, I'm more interested in just the flicker,
not necessarily building a complete candle emulator.
I found when converting old lanterns to stage use that multiple bulbs can sometimes be more pleasing. What about three to five ultra-mini LEDs all packed together, to give some "movement" to the flame?
I wouldn't doubt that multiple LEDs would be better, especially for larger light sources such
as a lantern. The problem now becomes more expense with more components and connections.
The simplicity of a single LED suits me for the most part since one processor pin can drive it
directly. On the other hand, even the Tiny13a has two PWM pins and running two LEDs of that
processor may be worth some experimentation.
-Rusty-