1.[Bulb Replaceable]The bulb of the work light string can be replaced simply and quickly. when the bulb life is up, it can be replaced with a bulb, this will not affect the use of the work light string, extending the life of the cable, up to 10 years. 2.[Super-Bright]10W per lamp,130lm/W,total 50W 6500lm, 5000K,useing of high-quality LED to meet higher brightness, can replace the traditional 100W per bulb incandescent cage string (a total of 1000W), saving 90% of electricity. 3.[Extendable and Safty]You can easily extend the length by plugging the head and ends of the work string lights together,the waterproof cover at the end can ensure waterproofing. Using 218 Awg copper core wire, it can carry a maximum of 9A current, can be connected up to 800ft, total power 800W, total lumens 104000 lumens. There is a fuse in the plug to avoid causing accidents. 4.[Construction and ,Wide Applicability] IP65 waterproof and dustproof, IK07 protection, can endure shocks, vibrations and rough handling without breaking the lights.Good for outdoor or indoor application, such as parking lots ,crawl space, docks, warehouses, workshops, construction sites, mines, factories, work sites, pits, attics, basements, storage areas, stairwells. Whether used for long-term or temporary lighting.