I have always been under the imprestion you dont ever blow them out. I dont really remeber the reson, i guess it was something like "you blow away the spell" or something. .
No, if you you put all of your energy, focus and commitment into a spell then the simple act of blowing out the candle is not going to cancel the spell ( if only it was that easy

But everyone has their own way of doing things you do it which way you want to. Remember what you read in books is just somebody elses (the author) opinion not 'gospel'
