On 2-9-2013 0:15, clipka wrote:

> Don't.
>
> Lightning bolts are exactly /how/ hot? Some 20-30 kK, right? Color
> temperature (i.e. the visible portion of the corresponding blackbody
> radiation) doesn't get any more blue than that. And with the air being
> turned into a plasma, emission from electron energy state changes within
> individual atoms plays only a minor role compared to the thermal
> emissions from free electrons and ions.
>

Indeed. However, I read somewhere that with distance from the viewer the 
colour becomes more yellowish 
http://www.ccmr.cornell.edu/education/ask/?quid=1271

In the image, I think I am going to use a more bluish hue.

Thomas

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