Got bored and don't have anyone to talk to about this so I'm putting it out here.
So this is a personal head canon that I have for lime bloods in homestuck.
Its that lime blood powers had something to do with the green sun. Think some kind of radiation manipulation or powers like first guardians. This being because the green sun looks a lot like it's specifically lime green to me. I also think this would be the case since we have no mention of lime bloods on beforeus. Maybe they can't fully control there powers at a young age not being able to control there emotions much like Jentha from vast error. and this would lead to them being raised isolated from the rest of society for this reason. And have probably just grown accustomed to being so isolated that they rarely ever either leave the group or join in with society in general. It would also explain the genocide that had taken place on Alternia. The condesce didn't want to risk that kind of power if a lime blood (or more) decided to join a rebellion.
Again this is a headcanon and not fact but I want to know what other people think about this.