WS2815 LED Strip is very popular on market because it's continuous breakpoint transmission, when one led stopped working, it won't affect other leds continuous lighting thanks to the backup data signal. 

Normal WS2815 Digital LED Strip comes with internal capacitance, which heat dissipation is not so good, especially for 144pcs WS2815 LED Strips. Maybe some of you has met this problem before. 

Now NEWSTAR LED's WS2815 addressable LED Strip is with external capacitance, function is same as WS2815 LED but performance is much better. Customer's feedback maybe the best evidence.