For really small set-ups, I use a home made snoot on a photoflood. This gives the appearance of a hard edge spot, and makes for some dramatic single source lighting effects.
I work as a dp for film and digital cinema, this has always been the preferred method to get this effect for miniatures. just make sure there's enough air circulation as I have had some bulbs burst it is not fun. fog machines help but if overdone it'll look like its underwater.
extinction meters tend to be more accurate if you substitute your morning oj for carrot juice.