I made an laser drill and 4 prechargers because i wanted to make something like direwolf20 on ForgeCraft2 Season 5 Episode 26 More Yellorium. I placed all slots to be lime (uranium) but when i started lasser drill i get ores like i don't have focuses.
*thought, and again, it doesn't give a gaurentee, the more drills you have though will lime focuses the better
Uranium is probably very rare to start with. Are you sure it's the Lime focus that boosts it, though? Could be standard Green.
I mean, I would assume lime green myself, due to it being a lighter green color; sounds more like Emeralds count as green, but who knows how they work? Maybe they just look at the color data values on the default textures and say, "Hey, this color corresponds to this lense!"