There are no silly questions

I finally found the link to:- JEFFREY E. SALZBERG http://www.stagelightingprimer.com http://www.stagelightingprimer.com/#fotometrix Which is a fairly good reference. [Yankee site - so some different terms are used] It also gets into 'photometrics' but does not cover the sharks tooth scalloping. But it may help. Like you David I'm not young enough to work this MacHines & do drawings. But one thing I must add, which I find in most ameatres, with the 'Y' wash there is the lack of Fresnel's used to smooth the wash & relying on Profiles to do it. This is one thing I don't agree with Francis Reid about. with his tenancy to create a patchwork quilt profile wash. Sure Profiles are great as a hard spots defining the set or area edging. Even with cross lighting, which helps, doesn't substitute for a Fresnel wash fill. Parcans work well as side light, otherwise they work best for Rock'n roll blat lighting. The only tweaking as such is orienting the linear hot spot of the bubble. However getting back to Na about working on small stage spaces. As a tip check out a Lighting Wholesaler , who supplies those low voltage diacroic track & display spots. In a lot of cases you will find they will have a Warranty Returns bin, in their warehouse. These days it is cheaper for the manufacturers to just replace/credit the fitting, rather than having them returned. Again a few comps will probably get you a bin full. Which most will be damaged or don't work. But with cannibalising them to make up good units. As the wholesaler won't spend time fixing them up -they go in the skip to be dumped.

TOI TOI TOI CHOOKAS

[May you always play to a full house] Hear the lights & see the sounds.