Both the same as PG-9HA/HB had UL/VDE approved for your more choice to fit your various design. Please see the pictures and you will know what you want. PG-9DH is the bottom leads inserting function. PG-9EH is the side leads inserting function. Both are suitable for bar light, track light... the socket also can be connected with 22 AWG teflon wire for two lites,three lites....more..