Novelty Lights 25 Foot C9 Twinkle Outdoor Patio Christmas String Light Set, Multi, White Wire, 25 Bulbs C9 25' White Wire Stringer and 25 Purple Transparent Random Twinkle Bulb Light Set - (One Stringer and One Box of Bulbs) 25 Long Life 3000 Hour Bulbs - 12" Spacing Between Sockets - 25' Long Each C9 Bulb is 7 Watts and 130 Volt - Nickle Coated E17/C9 Base Bulbs 20 Gauge Spt-1 Green Wire - 5-Amp Fused Plug - Connect 3 End to End 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.