A linear light fixture can include a housing that includes at least one wall that forms a cavity. The linear light fixture can also a light board having multiple light sources disposed thereon, where the light sources are arranged in a linear fashion with respect to each other on the light board, where the light board is disposed within the cavity of the housing. The linear light fixture can further include a lens slidably disposed within a receiving feature of the housing. The linear light fixture can also include a first auxiliary optical member disposed within cavity of the housing, where the first auxiliary optical member includes a first body having a first end and a second end, where the first body includes a light diffusion film. The first auxiliary optical member can fill a first gap between the lens and a first side wall of the housing.