ali1931: Pin Sockets have superior durability for outdoor exposed bulb applications, such as outlines, signs and marquees. There are three socket sizes (Medium base, Candelabra base, and Intermediate base). Available accessories include retainer clips and controllers. Use with 12-16 gauge wire (available from wire suppliers) to build your own custom system. Controllers (sold separately) allow for 2, 3 and 4 channels of chase. FEATURES SPECIFICATIONS FEATURES: -PIN socket -Medium base -Snap-in or clip-in sockets in three different sizes -For use with customized signage and marquee-style outlines -For chasing systems, use multi-channel controllers Back to top SPECIFICATIONS: -E27 type Back to top