Abstract: A light bulb body which may be blow molded from transparent or translucent polymer resin. The resin for instance, polypropylene may be blended with fillers and fire-proof agents such as glass fiber, glass microparticles and nylon fiber. The molded light bulb is hermetically joined with the lamp stem, filled with an inert gas and is installed with the screw lamp base. The "not-easy breakable" feature the said composite bulb body and the phenomena of color pigmentation, light refraction, total reflection and diffusion properties of the bulb material itself, thereby avoids the defects such as stereotype nature of a single material and vulnerability of the traditional glass bulbs.