There's two cheap light meters generally available on eBay:
DVM1300
http://cgi.ebay.com/DVM1300-Digital-...temZ7565676023
LX1010B
http://cgi.ebay.com/DIGITAL-LUX-LIGH...temZ7565063410
http://cgi.ebay.com/Digital-LCD-ligh...temZ7565287770
I know there's much better meters out there, but of these two (exceptionally cheap ones), which is preferred? I'm leaning towards the one that takes the 9V battery.