From the JoS website: Ritual Tools for those who are New .... CANDLES are representative of the element of FIRE. Candles for standard ritual should be black, but if black is unavailable, blue or red can be used. When summoning Demons, it is important to use the color related to the Demon...

I do smoke cigs and MJ as much as I can, well cigs im trying to limit. and yes it does help a little, but not as much as i would hope....