How many watts for which type of light modifier?

Started Sep 9, 2012 | Discussions thread
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goodlucksdk
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How many watts for which type of light modifier?
Sep 9, 2012

I am trying to figure out how many watts do you need for which type of light modifier?

Like for a 7' parabolic umbrella, do you need 400, 600, 800 or more watts?
For a 50, 60 and 70 inch octabox how many watts do you need?

Of course for a fill light you will need less watts than for a key light.
Anybody know how to decide which light modifier needs how many watts?

I am wondering if there is a way to calculate size vs watts vs F-stop vs distance?

I am wondering how far I can get with my 2 X 400 watt strobe lights and when I might need stronger lights.

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ISONew
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