Energy Saving and Long Life: 50 FT ST38 outdoor LED string lights come with 25 bulbs and 2 spare bulbs, 1W per bulb, the string light has an extra-long 30,000 hours long lifespan, which can reduce 98% electricity bills compared with incandescent bulbs Upgraded Waterproof IP65: With a high waterproof rating of IP65, these fully sealed weatherproof patio lights can withstand rain, sun, wind, snow, humidity, and extreme outdoor temperatures Dimmer Compatible and Practical: The patio string lights are compatible with various dimmers on the market (dimmer is not included ), perfectly to dim the brightness, creating a relaxing and romantic atmosphere Connectable and Practical: 50 FT outdoor hanging lights support end-to-end connection up to 20 strands, so just feel free to customize your arrangements. Each socket hanging hole can be installed with a cable tie, ropes or screw nails easily Shatterproof Bulbs and Wide Application: Bulbs shells are shatterproof plastic, so no more worries