[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [APD] AHS 55W lights



S. Hieber wrote:
> In the above, I use "cooler" and "warmer" in the oil artists' sense where redder white (like lead oxide) is considered warmer and bluer (like titanium dioxide) cooler. Of course, purely from a physics standpoint, since wavelengths are higher energy as one moves up through the spectrum from infrared, red, orange, green blue, violet, UV, X-ray, gamma ray, the bulbs with higher color temps are technically hotter than redder bulbs. Which has nothing to do, of course with the heat emitted by the bulb, which is a whole diff matter.  ;-)

Thanks for the report. Nice to know.

Incidentally, in photography the terms "warm" and "cool" are also used 
in the same sense as employed in your description. "Warming" filters are 
yellow and "cooling" filters are blue.

-- 
"He who throws dirt is sure to lose ground."

Jerry Baker
_______________________________________________
Aquatic-Plants mailing list
Aquatic-Plants at actwin_com
http://www.actwin.com/mailman/listinfo/aquatic-plants