>> Well, at least he didn't say an LED or a flourescent tube or something
>> with a complex emission system. A normal light bulb and a star are
>> (AFAIK) both simple black body radiators, so you just need to know their
>> colour temperature...
> 
> That just tells you the peak power output. The total power output might not be
> as much as an order of magnitude different, but it will be different.

I was under the impression that the colour temperature tells you roughly 
how the signal power is distributed over the whole spectrum. (Initially 
just IR, then red as well, and gradually more high frequencies, while 
the power at lower frequences decreases.)

> In any case, for a lightbulb, less than 10% of that 100W will be visible. An LED
> or fluorescent tube will emit mostly in the visible, so the power will be much
> more accurate for this comparison.

Yeah, both stars and lightbulbs presumably put out far more IR and radio 
waves than visible light...

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