I have the following LEDs but I’m unsure how to set them up (never installed lights before). I’ll be using quite a few LEDs soldered in parallel into three strings. Two strings will have about 10 LEDs each, and the third about 20. I was going to use the following resistance calculator, http://www.hebeiltd.com.cn/?p=zz.led...tor.calculator but I don’t know what number should I use for a voltage drop across each LED and what my “desired LED current” should be.

1. Can the three strings of LEDs be configured to run off one battery?
2. Can I use a 7.2V, 3,000 mah nimh battery I already have? The battery will power only the LEDs

LED data:
Size: 3mm
Forward Voltage: 5 ~ 7V/DC
MINIMUM MCD: 12000 - 14000 MCD

Thank you