dont use lightbulbs, dont use bottle, if you want a cheap and effective vaporizer look winto the www.dominizer.com i know ive posted it a couple times on this board, and im not advertising it or anything, but it beats 90% of those hotplate vapes and only costs 20$. Using it with a candle is kinda tricky, you gotta find your sweet spot and you CAN burn the herb a couple times while getting the hang of it. BUT i use a heatgun(20$one) and it works AMAZINGLY! same concept as volcano/vapor/supervapezilla, move heated air THROUGH the material to extract THC. Im not saying its as good as a volcano, cause it probably isnt, but it rapes my friends BC vaporizer. There is another similar one called the "uubie" or something, ive heard it works decently as well.

that IS a cool ass idea though, and it wouldnt hurt to try it with likea gram in a couple shots of alcohol, that way you wouldnt feel the drink, and just have allyour senses to see if you detect a marijuana buzz! although, the WORST that could happen, is you inhale about 3 shots of alcohol, and are left with some somewhat impure hash (but hash none the less).