If you didn't change time zone, then your clock source (like at the nearest cell tower) had it's time set wrong, and then corrected later in the day. That, Or you know the Doctor, it can only be one of the two.
The LED lights would be significantly more efficient than the current sodium-vapor lights and would produce the same amount of light while using a fraction of the electricity. Same amount of light same light pollution just a different color. A lot less energy use that's a plus but white light is a harsher light pollution.