Vett58,

Thanks for the response. The problem end up being in how I had the LDR circuit constructed. The code was not the issue. Originally, I had the LDR in a configuration that turned on a transistor when light changed. This did not work well so I reconfigured it into a simple voltage divider fed into a comparator. This works much better especially with a potentiometer serving as a variable resistor in the divider.

Happy holidays