I have two different Twilight low-voltage landscape systems around the house and pool. One is a model CB-250MD and the other one I can't find a model number for. Both systems work with the exception that they are always on during the day, when the switch is placed in the Dusk to Dawn mode. I'm assuming that the photocells have either gone out, or the plastic housing has yellowed to the point that they are allowing enough light in to turn the lights off. The sensors are out in full sun and are not blocked by building or vegetation. I don't think the sensors can be replaced as the wiring goes into the transformer and not mounted with terminals.
I can't find anything on the internet about them, other than companies that sell parts for then. I can't find a user manual either.
Does anyone have any experience with these systems?