This is all going to get messy eventually as we are not going to be able to buy #47's #44's or #455 one day and instead will be forced to use LED.
Self flashing LED instead of #455??? They dont exist as far as im aware.
I would guess I can buy enough incandescent bulbs to last my lifetime for under $1000 USD.
I don't like the looks of LEDs and don't think I'll ever change.