An interior sidewall panel assembly for a passenger aircraft includes a generally planar sidewall structural panel having a D-shaped window opening with an apex that is directed rearward and tilted slightly upward relative to the horizontal, a window assembly disposed in the window opening, an indirect lighting module disposed at a forward edge of the D-shaped window assembly and arranged to direct light forwardly such that the light washes onto a rear margin of a structural panel of a next adjacent panel assembly located immediately forward of the light module, and a kick panel disposed at a lower margin of the structural panel that incorporates cabin ventilation or decompression ducts and vents and an accent light adapted to direct light onto a cabin floor of the aircraft.