The LH0535 Edwin Gaynor 787-7 is a CFL lamp support. It is stainless steel horizontal lamp support. The 787-7 is for 2G11 base "Long twin tube", "PLL" and "Biax" CFL or LED lamps. It is designed for screw down mounting. The 787-7 has a 21mm lamp axis (the lamp axis is the height above the fixture pan that the center of the lamp is.
Link to 2G11 base lamps that fit into this bracket