Re: Question on flash and power or intensity measurement.

[Jan Faul <jan@xxxxxxxxxxx>]

I?m sure others will chime in, bu your problems is easily solved with a light meter and a tripod. Good luck on getting a bunch of hot lights to be the same strength as studio strobes. Studio strobe are either nearly as bright or brighter than the sun.

Jan

On Oct 18, 2013, at 10:14 PM, Joseph Chamberlain wrote:

Hi, everyone.

I need help with a question I have that relates to flash units and studio lighting.

My specific project requires that I use static lights (if possible) in place of strobes or flash units (on or off camera). I am trying to replace the flash units I now use with static lights that will provide the same amount of light.

My question:

1. How can I calculate and convert the amount of light emitted by a flash unit based on its guide number ? Lights are usually measured in Watts, Lumens, Candles and other units. How can I calculate this value (or values) for my flash unit so that I can buy studio static lights that produce the same degree of illumination ?

Thank you all in advance for your help.

Joseph.

PS: Any recommendation of book titles that cover this subject (the mathematics of flash and studio lighting calculation) will be very appreciated.

Art Faul

The Artist Formerly Known as Prints

------

Art for Cars: art4carz.com

Stills That Move: http://www.artfaul.com

Greens: http://www.inkjetprince.com

Camera Works - The Washington Post

http://www.washingtonpost.com/wp-srv/photo/battlefieldparks/front_qt.htm

ArtNet: http://www.artnet.com/artists/jan+w.-faul/

.