Haha , it's a bit late but I found this fun little article while looking for another podcast
http://www.theoutdoorsstation.co.uk/201 ... thin-tent/
All they need are some of these (don't laugh - I have a couple of sets for putting in shrubs outside for parties, and it's a fun light way to light up a tent at any time - gives it a little atmoshere)
http://www.ebay.com.au/itm/Warm-White-4 ... 1e7012c94c
or the little battery operated tea lights (I have some that even change colour)
http://www.ebay.com.au/itm/24-PCS-7-COL ... 3a796cb44d