Primitive Everlasting Glow Patio Lights Strand 20 Count Electric Round Bulb Indoor/Outdoor. Popular string lights are perfect for that soft white glow on your patio or porch or your home. I use a strand of these on an old 6 Paine window frame (no glass) weaved through and suspended from my ceiling in my office. Love the soft warm glow it gives off. Use indoor or out. Electric and you can connect up to 3 strands. 20 lights on each strand with round bulbs. Replacement bulbs are G40 lights. UL Listed. Lighted length is 19 feet and total length is 20 feet. 4 Boxes available to start.