A lighting apparatus includes a bottom housing, a light cover, multiple LED modules and a light source plate. The bottom housing includes a bottom plate. The bottom plate has a first film layer and a substrate layer. The first film layer has a width between 2 μm and 120 μm. The light source plate is mounted with the multiple LED modules on a top side of the light source plate. A bottom side of the light source plate faces to the bottom plate and the top side of the light source plate faces to the light cover. A light of the multiple LED modules pass through the light cover.