My parents got us a light for the high tunnel for Christmas, it is solar powered. I really want to push towards having everything that needs electricity in the high tunnel to eventually be running off of solar power, so this is a great start. The light isn't super bright but it is a whole lot brighter than complete darkness.
Yesterday we had quite a bit of water flowing through the low part of the property, this area includes our outdoor garden, but the high tunnel was built on higher ground.