WOW! THAT'S THE FIRST THING THAT I HAVE TO SAY.  I'VE BEEN SHOPPING FOR THE "PERFECT" OUTDOOR STRING LIGHTS FOR YEARS. WHEN MY 2 GRANDDAUGHTERS VISIT, THEY LOVE TO SIT ON THE DECK, BUT THE HEAT OF SUMMER DAYS DOESN'T WORK WITH MY MS, SO EVENINGS ARE BEST. I REALLY NEEDED TO LIGHT UP THE YARD FOR THEM. WHEN I CAME ACROSS THESE THEY SEEMED PERFECT, AND ONCE THEY WERE UP, I REALIZED THAT THEY ARE NOT JUST PERFECT, THEY'RE ALSO GORGEOUS. COMMERCIAL GRADE IS DEFINITELY THE WAY TO GO, HEAVY,  RUBBER STRING, BEAUTIFUL LARGE BULBS. NEIGHBORS ARE ALREADY COMPLIMENTING ME ON THEY'RE BEAUTY. THANK YOU, THEY WERE DEFINITELY WORTH THE WAIT.