Damien Hirst Orders Serious Solar Power

Damien Hirst, the world's most expensive living artist, is going green in a major way: he recently placed an order for Britain's second largest solar panel system. The system will be used to switch his Gloucestershire country home and studios over to total solar power. I can imagine he's got a lot of electricity needs for his entire estate, but I'm wondering if a 310 watt system (enough power to supply electricity to the equivalent of over 150 homes and will account for 2% of the entire country's solar power) isn't a bit overkill?