【Upgraded Connect Up to 600 bulbs!】Yuusei outdoor bistro lights 100 ft come with 50 plastic bulbs and 2 spare bulbs, you can easily connect them end-to-end to 600 bulbs! Get creative and design your dream yard setup, just the way you like it. And guess what? You can dimmable them too! It is compatible with most dimmers on the market. (No dimmer included) 【Safety First & Lighting Your Life】The adapter of Yuusei outdoor string lights have built-in a spare fuse, easy to replace. When there is an overload or short circuit in the circuit, the fuse will quickly disconnect the circuit. No need to worry about pets and children's electrocution. Enjoy your time after a busy day or have a cosy party with your family. 【Lighting That's Kind to Your Wallet】Say goodbye to energy guzzlers! Unlike traditional 5W string lights, Yuusei LED string lights use energy-saving bulbs with 1W consumption, resulting in up to 90% savings. Each bulb operates to its tune, so if one takes a break, the rest keeps the work going strong. 【Waterproof & Shatterproof】ETL certified cafe lights are manufactured of weatherproof plastic material, which can withstand extreme temperatures, rain, wind, and damp climates, protecting you and your family while hanging the waterproof backyard string lights, no more worries about the suddenly broken glass shards. 【Widely Used & Warranty】Our outdoor lights are great for balcony weddings pergola gazebo tents BBQ market cafe umbrellas decor pond lights. Please contact the seller directly if you have any quality problems.