Bulb type light source apparatus

To provide a bulb-type light source unit and the light-transmitting cover used to have a new light distribution characteristics. A bulb-type light source apparatus includes a light source unit, a light transmitting cover, and a base unit. The translucent cover includes a first region having a convex lens function, and a second region having a concave lens function. The base unit, the second region so as to located closer to the light source unit than the first region, to support the light source unit and the translucent cover. .FIELD 4