A bulb-shaped lighting unit made of blown borosilicate glass, with good shock resistance properties and excellent transparency, due to the reduced thickness of the material. The led filament is held in position by a molybdenum structure incorporated in a thin tube, also made of borosilicate, which is used in turn to extract the air and therefore prevent any internal condensation build-up. The light source consists of a 225 mm long flexible micro-led filament, using customised electronics which can handle a light flow of 210 – 450 lumen, using the most common Triac dimmers