I recently gaffed a film with lots of candle and fire light scenes, which gave me this idea... So I built this device that flickers a light in sync with an actual flame, be it candle or fire... (it is currently set up to handle up to 1.5k but could easily be modified for higher wattages) The sensor, which reads the light levels, is currently attached to a length of speaker wire and is very small (easy to hide in a scene) I guess i'm wondering if anyone would actually use something like this or if people are happy enough with current methods.
Here is a lousy video example I filmed with my droid.
http://www.youtube.com/watch?v=Ihoepxi2iCo
and here is an example in use...
http://www.youtube.com/watch?v=9ruHodNoMYo
there are dimmers to control high point and low point, as well as two knobs to control the sensitivity of the sensor