Thats the plan so far, I was just planning to use 2 different cirquits connected to the same LED.
I just finished the electrical design. I use 2 capacitors in series for up to 5V 100F
This gives me somewhat decent runtime on high, and a really long runtime on low. High is 350mA (amc7135), low is between 10 and 20mA(150Ohm resistor in series (I know its not really efficient, but i think its ok for the low power)) depending on the voltage.
I now just need a case, and I dont really have an idea, what I could use for it.
use plywood, you can make it into any shape, just read my thread about plywood lights i build, very tough, and easy to work with material.