Maybe not as bright as you're thinking, since they were painted a base of the old Goblin Green, but then had Scorpion Green as a highlight…
There are other ways you could get a lighter colour. These had a black wash for shading, but I found a green wash made them look a little lighter. You could also try a green wash straight over a white undercoat until you get a green you like. A more brownish green, like Ogryn Camo makes for a more realistic, less cartoony Ork with fairly light skin with a greenish tinge.
It sounds like it's been a while since you painted, and the whole
GW paint range has changed, at least in name, so maybe just hit the paint racks and see what strikes you.
There's also a whole bunch of other companies' stuff to choose from too if
GW doesn't have exactly what you're looking for.