Light-emitting diode (LED) bulb with small caliber and large volume

The utility model relates to the technical field of bulbs, and discloses a small-caliber large-size LED bulb which comprises a lamp holder and a bulb shell connected with the lamp holder, the bulb shell is made of PC materials, and the diameter of an opening of the bulb shell ranges from 10.0 mm to 17.0 mm. Compared with the prior art, the LED bulb has the advantages that the large-size and small-caliber bulb shell is directly made of PC materials, the bulb shell can be matched with a small-size lamp holder, the production cost is greatly reduced, the PC materials are clean, environmentally friendly and environmentally friendly, the manufactured bulb shell is better in use effect, meanwhile, the large-size bulb shell can be matched with the small-size lamp holder, and the service life of the bulb shell is prolonged; the bulb cost is further reduced; the PC material has the advantages of being wide in application temperature, high in light transmittance, low in forming shrinkage rate, good in size stability an