Sun System® LEC® Brand Inner Sun® PGZX Socket Assembly utilizes cutting edge Light Emitting Ceramic® brand technology (ballast required). This unit is ideal for inner canopy and supplemental lighting applications. These sockets come with the patented male lamp receptacle which is compatible with Galaxy® LEC® Brand 315 Electronic ballasts. The Inner Sun® has a flexible pigtail strain relief with a ceramic open rated PGXZ socket. Comes with a white powder coated junction box. US Patent Pending: 29/542,729. Chinese Patent: ZL2016301246206. 5 yr warranty.