What are the classifications of lamp materials?

There is also aluminum alloy: aluminum alloy is the most commonly used material for making lamps. Usually, I often hear that lights should be turned on, and aluminum alloy should be pressed after turning on the lights. There are zinc alloys: but the cost of aluminum alloys is relatively high, and some lamp structures with low material requirements can be replaced by zinc alloys. Its mass is slightly heavier, but its cost is relatively cheap. There is also steel plate: steel is also a very common material in lamps, which is widely used and much cheaper than aluminum. Plastic: plastic is just a general term, including many kinds, such as PC and PMMA. It's a polymer. Mirror aluminum mirror aluminum material is unique in the lighting industry, and other products are rarely used.