Just averages, drain about 4 W. 4 AA NiMH = 5 V, 2000 mAh, will run for about 2.7 hours. 12 V, 100 Ah car battery = about 300 h. Required 228
= 228 h.
I had good luck with a stage hat that had 30 LEDs, 3 parallel strings of 10 LEDs in series with 3 resistors. 1/4 th of LEDs on at a time. Driven from 4 AAA, NIMH batteries & a boost converter.
28 gauge wire gives about 15 ft. / ohm.