1. Materials:

1 Plastic coating: low price, easy processing, easy to master the accuracy, easy to design high-quality products, but not high temperature resistance, high-power equipment can not be used.
2 Glass: It is difficult to process and seldom used.
3 Aluminum alloy: Aluminum metal cups are used in all high-end products without exception. The advantages are left to you to think about. The disadvantages are high price, difficult processing and few excellent products can be produced by current domestic processes.

2. Surface technology:

1 Plane: High reflective efficiency, easy to process, but because the current light source is still difficult to achieve pure points, all have a certain shape, such as filament, it is easy to cast the image of filament and the image of the bulb wall, forming a disgusting halo.
2 Walling: It's a good way to make many reflective surfaces. It can effectively reduce the halo and increase the uniformity of light, but the loss is great. What's more, it's easy to make the reflective surfaces bigger and harder. There are not so many reflective surfaces between the small reflective cups and cubic inches.
3 Orange peel: Make the reflective surface into rough orange peel, which is the highest level of reflective cup at present, but this process is more difficult to master, the texture is larger and easier to disperse, and the small texture is more difficult to do.