25 Foot C9 LED Outdoor Lighting Christmas Pre-Lamped String Light Set, Pink, Green Wire, 25 Bulbs 25 Lamp C9 LED String Lights Sets - Green Wire String Length: 25' Long with 12" Bulb Spacing - Connect Up To 43 Sets End-To-End - UL Listed For Indoor/Outdoor Commercial Grade with Non-Removable Bulbs - Full Wave Technology No Flickering Energy Efficient Using Only 4.8 Watts per String - Built in Rectifier No Special Adapter Needed General Mounting Tips: Always mount the string first before screwing in the light bulbs. For Outdoor Patios; We recommend using "aircraft wire" to use as support cable for a clean professional look. If you choose not to use a support wire then a hanging wire will be satisfactory. For rooflines; Mount along the roofline in accordance with our all in all clips (ASIN B004TNDB2I) to mount under shingles or on gutters which creates a strait secure line along your home.