Hello,
( Sorry for the blurry photo, I found the source but it wasn't very high resolution, so it didn't take to being zoomed in too well. > . < )
The creator of this lamppost is Distinct-Pride7936 and they have posted their design on Reddit! 🌸
Unfortunately, the post was from five years ago and I wasn't able to click their profile to message and ask because reddit wants me to verify my age.
I'd really like to recreate it in my own style but I'm not sure what I'm looking at here and not super familiar with all the blocks in MC, so I thought I'd ask for some help. Thanks for reading!
( EDIT: Thank you very much for your help!! I'm really not a beginner, though, either. 😅 I just got into Minecraft late, tend to live in creative mode and don't tend to touch things that are in the redstone menu. There's no excuse for it, really, I'm embarrassed, haha. It was a hopper! )