I hooked up an LED light to the previously-mentioned solar project.  I was pleased that the battery easily held for twenty-four hours.  The battery could have lasted longer, but I shut it off because the battery was getting low.  We have had three straight days of rain.  During the days, the solar panel will charge the battery, but it does not do it very fast.  I need a good, sunny day to get the battery back up to where it should be.  I guess it is a good test of a scenario to keep in mind when expanding the solar project.