"Lightning" effect on stage - any tips for equipment?

I used a very effective "blinder" flash during "Narnia - The Musical" to allow Aslan to escape the stage unseen.

Simply aim two open white 1kw Parcans (USL & USR from the wash Cyc-wash bar on the rig) at the front rows of the auditorium with the barndoors wide open and focused to as wide a beam as possible.In this case spillage is definitely acceptable! This pair should be set to have as dull a glow as possible during the main of the play to keep them "warm" but not off.

Then, at the required moment hit the scene flash key on the desk causing a brilliant flash of ALL lighting with the added kick of the white light. Effectively giving a few seconds grace while the audiences eyes react and re-adjust. Adjust the length of your thunderstorm by the number of times the key is held open, the lights will react as often as you hit the button..but don't hold it open too long or the effect will be wasted. Just a quick jab or two will do the trick!

For lesser brilliance use a lower wattaged lumineire. (Even 500watt "workshop portafloods" will do the trick..and incidently make great lights for stand in fireworks displays!) As for synchronising against a sound track, don't bother... sound travels slower than light, therefore people are accustomed by Mother Nature to seeing the flash and then hearing the thunder and a couple of milliseconds delay wont matter.(After all, you are trying to create "reality")

Hope it helps.. 

"Joke 'em if they can't take a f*ck!" - Robin Williams