Our outside string lights are made of durable plastic, more shatterproof than other glass bulbs. It is perfect for outdoor lighting and the insulation material can protect the strand from extreme temperatures, rainy, windy, or damp climates. Compatible with a dimmer switch(NOT Included) to create the perfect atmosphere for your evening relaxation. 1W LED filament will help you save 90% on electricity bills compared with incandescent bulb ones. Low heat-led outdoor string lights will never get hot even after being on for hours. A LED filament that goes out does not affect other lighting LED filaments. Each socket hanging hook can be installed with a cable tie or ropes easily. Link up to 20 strands.