Looks like a barrel plug. These are very common and finding s as replacement should be easy. On the underside of the lamp there will be writing that says what the electricity requirements are. e.g. 12V—-400mA Look up a replacement using those numbers.

I wish I could fail upwards like that.

I haven’t been on Reddit since Apollo went dark. I’m done with it except for a couple specific communities until similar ones are available here.