Luminale is the lighting culture Biennale here in Frankfurt. I've visisted some places in the last two days. The reddish picture was taken in the cathedral.
I would like to recommend you to go to the Naxos-Hall
This one is not acutally a luminale thing: it's Mrs. Anne Wood:
And this nerdy looking one wasn't as nerdy as I thought. But I would also recommend you to go to the Palmengarten.
Missed to take a picture of the project at the Freimaurerloge...