Can the round light bulb be turned on directly? Is it dangerous? Is there any toxic gas in it?

First, it is in a vacuum state, and then inert gas such as nitrogen is added.

There must be a big difference between internal and external pressure, which is why the light bulb will explode when it falls.

Be very careful when disassembling. Unless you are a professional, don't disassemble at will.

There must be danger!

This gas is non-toxic, because the nitrogen content in the air can reach 78%.

Suggestion: Don't disassemble it at will, in case of scratch, explosion debris scratch and other dangers.