Turn off the breaker to the outside light plugs or outdoor receptacles.
How to protect outdoor christmas lights from water. Make sure to seal off the back of your Christmas light connection with a gasket and weatherproof plug. You may have to wrap the tape around several times to accomplish this. How To Protect Outdoor Christmas Lights.
There are many reasons for this but at the top of that list is the fact that better quality lights. These power stakes are similar to surge protectors in that they offer a multitude of outlets with some overload protection options. It would also be a good idea to put a drop of moisture displacer in the socket.
Wrap Teflon tape electrical tape securely and carefully around the plugs completely coating the plug to prevent water from getting in and effectively creating a water-tight seal. Take a utility knife be careful and cut up the holes as required. Outdoor GSI is extremely sensitive to moisture.
If you have ambitious plans for your Christmas light display this year you may want to pick up some outdoor outlet stakes. Older homes may not have them but they will have a weatherproof cover over the receptacle. Plug the Christmas lights into your Ground Fault Circuit Interrupter GFCI or outdoor outlet.
These are small clear boxes that fit over the outdoor light fixtures and seal them to make sure no moisture can penetrate through to the bulb or the light fitting. He said that Christmas lights are meant to be used outside and will work in the rain. When plugging outdoor items into an outlet use an outdoor receptacle.
Another main concern with outdoor fixtures is bird droppings. 6 Close off the open back. This wire has no end plugs or sockets allowing you to choose where they go.

