http://chaokhun.kmitl.ac.th/~kswichit/saver3/saver3.html
suitable for videography
http://www.studio1productions.com/Articles/FL-Lights.htm
http://www.aaroncake.net/circuits/lightdrk.htm
http://www.clcombat.info/enicad.html
build a simple floodlight usign an office rubbish bin made of metal and a photoflood bulb
http://www.dmx512.com/web/light/diy/lflood/lflood.htm
uses four low wattage coloured bulbs and four fluorescent lamp starters
http://www.dmx512.com/web/light/diy/flikfire/flikfire.htm
powered by a 9 volt battery.
http://www.mrollins.com/flash4.html
includes simple controller circuit
http://www.colomar.com/Shavano/lighting.html