When applying for a trademark, only the light bulb in item (11) of102 was selected as the commodity item. If your trademark is registered, your trademark will only protect light bulbs or similar goods from being used by others.

Your third question is unclear.

I suggest you ask your agent. If you think that the agent's fee of several hundred yuan is not worth paying, you may make a wrong decision. Of course, it is better to find qualified agents.