Thanks so much!! :D I was really self conscious about going light again since I've been darker for years..
I have a typical scandinavian haircolour, dark (mousy) blonde with lighter highlights from the sun.
I use Stargazer bleach (think it's a UK brand) since that's vol. 30 and the highest I can get my hands on, since I'm going for platinum blonde without the toner.
Also I've found that stargazer (a "punkish" brand) has a fairly low amount of unnecessary ingredients in it. Smells like toilet-freshener though