There are many different forms of Northern Lights and A LOT of strains are descendants from that strain. Came out of Seattle in the early 80's. I don't think a pure NL strain is really that common for commercial growers. A pretty common one that I've come across is NL(#2and#5 are the most common)xBig Bud. It ups the potency of the Big Bud and sometimes the potency of both the Big Bud and NL really come through. I can't answer your question, because I'm not an aussie so I can just babble about NL. There are a couple of strains though that if dealers don't know what it is they know people will perk up upon hearing. NL is one of those. Sweet Tooth comes from NL#1 with a little tiny bit of Blueberry in it. It's common. Peace.