The most obvious choice for outdoor lights would be either solar powered, or battery operated lights. However most of our lights can to be used outside, providing you keep the power source safely indoors.
Have no fear we sell connectable lights where you can link together multiple sets to get up to 5000 lights, all from one plug socket. These are perfect for large outdoor trees.
This is another benefit of using LED lights, unlike fairy lights, if one one bulb goes out the rest of your bulbs are still safe and will stay illuminated.