Don’t know about green but I got a Home Assistant Blue and it’s good enough. Tho You can just use a raspberry pi.
Side note I think you were being sarcastic when you said Home Assistant Green, so I wanted to make reply that sounded sarcastic but Home Assistant Blue and Home Assistant Yellow are real things, tho rereading my comment if one isn’t familiar with technology or home assistant talking about Home Assistant, colors, and raspberry pi for controlling light bulbs just sounds like trolling.
Edit: Sorry, Home Assistant Green is also real. It’s every level hardware that is more than enough for running home assistant and Home Assistant Yellow is the next step up in hardware. Home Assistant Blue was a limited edition run of the hardware prior to Home Assistant Yellow being created. To be clear, I am not trying to troll but to one that isn’t familiar with this technology these names might sound like trolling.
My apologies, before now I haven’t heard of green. I legitimately run my instance on the limited edition blue that kinda lead to yellow being created and before that I used a raspberry pi. My original comment was a little bit of me finding the naming for this stuff funny, not trying to discourage anyone that is new to the platform.