LED Hi-Lo Lighting

Good Morning Guys,

Im sure this is easy for many of you; however ive not worked with arduino or any kind of programming hardware/software before so i have no idea although certain this is feasible with the correct hardware.

I would like to power a 240v exterior LED wall light, however i would like to have it operate on a photocall sensor at aprox 20% output and then operate at 100% on a PIR sensor.

Is this possible through arduino i assume using relays of some sort and a dimmer?

Many Thanks in advance
Martin

try a web search for arduino outside led dimmer