Glow Worm Bottle String of LightsGlow Worm Bottle String of lights These 'lightning bug lights' are perfect to add a festive and romantic ambiance to any room. Tired of your living room? Bedroom? Or simply want to add some pizzazz to your porch or door? You will never go wrong with thesewarm LED bottle lights that look like magic fireflies sparkling in a glass bottle. The String of Bottles comes in two sizes. A string of lights has 8 bottles 4 bottles of each size . Each bottle hangs