Daniel J. Stern
OK - so 'efficiency' would actually be a more meaningful term - since what people are really interested in is "useable" light for wattage put in (and for good or bad, fits more with what Websters says for 'efficacy' - wouldn't be the first time that technical definitions don't go along with the common or dictionary usage).
But if 'efficacy' is the term they use in the industry, then that is what they use, even though people are more interested in *useable* light per watt and therefore it seems like an inferior term for lights used for the purpose of illumination that humans can see and use. I guess measuring useable light would require filtering out wavelengths outside of a certain defined *visible* band. Perhaps that band is not so easily defined, hence your saying that 'efficiency' is a more *ethereal* term.
Hmmm - let's see. Ethereal: Of or like the ether, or upper regions of space; hence, very light; airy; delicate: as, the ethereal grace of her dancing. Heavenly; celestial; not earthly. In chemistry, of , like, or containing ether. :) Just messin' with you now.
OT Article on KatrinaI know this is quite OT, but given the amount of Katrina talk going on in the group, I thought you'd all be interested. If somehow you had not...
Bill Putney (To reply by e-mail, replace the last letter of the alphabet in my address with the letter 'x')
