The LEDS are arranged in 10 rows of three each for a total od 30 leds per lamp. I bought a 12V and 6V 2.9ah batteries and wired them in series to give me 18V. Interesting that there is no voltage drop, still at 18V and pulling 1A.
I am working on a charging circuit using a LM317t regulator to charge the batteries now.
Edited by larrybl, October 31, 2015 - 07:08 PM.