Well it really depends on how strong your blotters are...With weak stuff, a half hit would produce almost unnoticeable effects. Lots of folks say halfs are lame With one full hit you should be pretty certain that you will get visuals...and stuff...Youl trip Lsd is pretty hard to explain.
i have half-hits of Fluff and each one is way over 100mcg. i'm sure the whole hits are 300mcg maybe more. they cut them into half-hits because the sheet was laid ridiculously strong! don't want naive people freakin' out...