sparky, 314.24(F)(exceptions) will allow up to 3' projection from the roof if the fixture weighs les than 20#. But, as I stated above 3' may not provide enough beam spread on such a large flag.
The short pole or 2 sounds like a "best option" for you. You'll never get an even lighting pattern from only 3' away. We also have had very good results from racks of "KC Lights" (the 12v driving lights like you mount on a 4x4 truck). The beams are very controllable. Drawback is lamp life.
Some stores by me have weatherproof single lamp 6' or 8' HO Flourescents that stand off the bldg at each end and can swivel inwards towards the wall. I'll bet a couple of those would give some nice even light. I don't know any info on the fixtures except they've been there for a long time. They are pretty slim and probably light because they use external ballasts (1 per pair) that are located inside the building.
Bill
[This message has been edited by Bill Addiss (edited 11-28-2001).]
There are several manufacturers of interstate sign lighting using HID sources. I don't have any catalog info at my desk but would be glad to look up some for you. May need a few more details. Also you can locate a local Rep, and they will be glad to help with the layout and fixtures (luminaires). If I can help, let me know.
At least you've got the problem of how to light the flag.
Flags aren't flown anything lie as much here as in the States, and when one guy in a certain "looney" area of London put up the U.K. flag the local council ordered him to take it down as they considered it racist.
Sorry it's nothing to help you out but i had to get that off my chest. Makes me so mad.