Kari Kivisalo wrote:
> my guess for the modifier would be 90^2/FO^2, until I find> out how lighting engineers calculate spotlights.
I've not still tried to understand this:
http://www.escape.ca/~williams/lxspot11.htm
but I think it contains interesting data.
--
Jaime Vives Piqueres
La Persistencia de la Ignorancia
http://www.ignorancia.org