WOW....That was fast. Thanks for the responde sir.
Well, i already know how to control leds, relays and to read and print data from/to the serial monitor. I already have the libraries added to arduino ide. The problem is just putting all parts togheter and how to organize my code. AND MOST IMPORTANT, CAN ARDUINO REMAIN TURNED ON FOR SO LONG WITHOUT FREEZING OR BURNING ?
About the voltages, Yes, there will only one 220v ballast that powers a 400w lamp. The ventilation fan and exhaustion fan is both 110v.
Thanks for the warning, i didn't mind about the safety but now after your advise i see there is more research to be done.