How to setup an LED hunting light? Answered
I'm trying to copy something I've seen online...without buying it. So I dont have a light to look at in order to copy it.
I'm doing this for my own use, not to sell, so i'm not trying to take business from anyone.
Online they have hunting lights that are green LED's that hang below a feeder. These are used for wild hog hunting since they usually come out to feed at night. They cannot see the green light, but green is easier to see at night to the human eye.
I'm wanting to power it off of the 12v battery in the feeder since I have it charging with a solar panel.
The LED's i found online for fairly cheap are super-bright 5mm green LED's. It says they give off more than 8000 mcd (light rating?). They require 3.2v (3.4v max) at 20 mA.
I've looked at some of the posts on this and wanted to know if my math is right on how i can set these up.
I figure i would wire 3 in a series, which would require 9.6v. Using Ohms law with a current of .020 Amps, I get (12-9.6)/.020=120 Ohms
So, 3 LED's in series with 120Ohms worth of resistors and my 12v battery will power it fine. The part i'm not sure about is how the current works with this. The battery is 12v 7Ah. Will that fry them or is the current the amount of juice it has?
If i wanted to make a light with say, 30 LED's, can I make these 3 LED units and wire multiple units together in parallel? so each unit would power off of the 12 volt and the parrallel units? Hopefully this makes sense.
Will this work? Is this the best way?
Any suggestions or comments would be appreciated. Thanks.