The remodeled RGBW+2 C9 molded strings, adds 2 extra LED's for a total of 3 to maximize brightness, the WW diode for enhanced color blending & a 4th wire Double DATA line to isolated rogue pixels & carry the data signal throughout the installation. We stock this item in 15" bulb spacing, with 7.5" leads and ends, in lengths of 25L, 10L, 5L, 2L & 1L. Permanent mounting track available in white or black. Also compatible with seasonal gutter clips. Faceted bulbs, green cable. Control with WEC3, MeshTek, ArtNet, sACN, LOR, X-Lights and more.