The brightest thing I could come up with is the night sky, if you see what I mean. Using a tripod and a cable release I fired the shutter and went to watch TV with a cup of tea. 30 minutes later I came back and closed the shutter. It’s worked quite well, no shake, hardly any cloud at all and I just about got the pole in the bottom right – I needed a smart phone app to help me line it up. The film is Ilford HP5+ and it went a little too grainy so I did a lot of correction in Photoshop. I need to start thinking about how film changes its properties over long exposures. Below is an alternative image where the sky isn’t so dark. Click on the image above to see some other bright things.
Mostly Monochrome 
Discuss!