Is the output voltage 12v AC or 12v DC?
It's AC 12V.
Why the light are not remaining light on?
The problem could potentially arise from the customer overloading the transformer by connecting too many lights.
Please disconnect some of the lights and observes if the transformer operates properly.
Lighting on the front of my walkway was working fine. Now all of a sudden it just changed so the date is correct. I'm just trying to get the sunrise to work so it turns off and on. In the evening when it gets dark and off in the morning when it gets light.
It sounds like there might be an issue with the programming of your walkway lighting system. Please refer to the link as follow: https://www.youtube.com/watch?v=gZ6QKuZmtUc. It contains useful information on setting up sunrise and sunset automation for operation.