Send DMX from arduino via Photo-sensor

hi I'm looking if anyone ever wrote that kind of project.

I wound simply like a lamp to toggle ON/OFF depending on the information the light sensor reads.

I would need the lamp to be controbled by a light-board (Grand MA) thus the DMX.

Your help is greatly appreciated

RS

A good start http://www.mathertel.de/Arduino/DMXSerial.aspx