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Flash Bulbs

It should say on the back of the box (and on the bottom of the
bulb) what type of bulbs they are.  The box should have a
table to find your GN for a given film speed.  
Once you have the GN, you divide it by the f/stop to get the 
maximum distance.  If you got the blue coated bulbs you can 
take OK color pictures with daylight film, If you got clear 
bulbs, you should use (blue 80 series) filters or Tungsten film.
                              
I'm just a beginner, so If I'm wrong, please someone correct me!

If you have more questions mail to: gccampos@xxxxxxx

                                       
Grant


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