The LH0910 is a an adapter converter that allows an E26 medium incandescent or LED bulb to replace a 4 pin CFL bulb. Ther are no indexing tabs so it will fit all G24q or GX24q-1, 2, 3 or 4 base socket / lampholder. The LH0910 will fit GX24q-5 or -6 sockets if the half circle protrusions in the center of the socket are removed.
*MUST be installed by a licensed Electrician
**Ballast MUST be removed, prior to using