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Re: Can tinted films make cheap lights visually pleasing?

PacosBilly at aol_com wrote:

> David,
>     I believe that you are trying to shift   the color spectrum for your 
> favor, however I think that would require energy, the laws of physics would 
> dictate that without any energy change taking place, there could not be 
> different wavelengths? This based on the idea that all chemicals give out a 
> spectral signal, and that there is no way to make one chemical shine in a 
> different specturm, you can block out certain frequencies, however the bulb's 
> phosphors would have to make different leaps to higher frequency (similar to 
> how water will evaporate, i.e. the highest energy particles move into the 
> air, and only the lesser energy molecules are left in the dish, hence making 
> the water cooler, i.e. evaporation). In this sense though, energy is going 
> the other way, into the phosphors, making them leap to a higher quantum 
> state, and eventually fall back down (that is what light is, the energy given 
> off from electrons jumping to the next rings of the moleclue) Chemistry 
> people? Am I far off base?  I know chemistry always brings out the flames, so 
> lemme just say I'm trying to throw stuff out for discussion. I guess Ivo is 
> the groups authority on lighting as I've seen, Ivo, any comments? Thanks, Bill

You are basically right in the sense that, if the ligth bulb does not emit
at a given wavelength band, no filter will "create ligth from nothing" at
that same wavelength band. A filter works by absorbing existing light, and 
only a broad-band full-spectrum source such as a incandescent of full-spectrum
fluorescent bulb could be filtered to get its spectrum reshaped in any useful
way. That would come with a high toll on the _level_ of the resulting ligth

And thanks for the "authority", but I'm just another hobbyst that learns 
way more than gives back at this list ...

- Ivo Busko
  Baltimore, MD