Homemade Green LED Fishing Light: How Long Will a 9 Volt Battery Last?

Question from a Reader on how long the 9 volt battery will last in the light.  So far, this one has been on for over 54 hours.... and still counting!  This one uses the same circuit as designed in our article - Making a Simple Green LED Fishing Light - Part 1 LED Circuit.  The difference is a Sealed Glass Container is used instead of a PVC Body!

Click-on Fish Bulletin Board to checkout fish caught by our readers.