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From: chased@rbbb.Eng.Sun.COM (David Chase)
Newsgroups: ca.environment,sci.electronics,misc.consumers.house
Subject: Re: Compact Fluorescent Varieties (Was Re: Recycling LIGHT BULBS?
Message-ID: <6527@exodus.Eng.Sun.COM>
Date: 24 Jan 91 01:42:30 GMT
References: <1991Jan9.171802.509@amd.com> <10215@pasteur.Berkeley.EDU> <1991Jan16.161148.3458@cs.umn.edu> <1991Jan16.203819.16618@amd.com>
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phil@brahms.amd.com (Phil Ngai) writes:
>That's the whole idea, that CFs give more lumens/watt, but since most
>people don't know how many lumens an incandescent gives off, it's
>easier to talk in terms of "equivalent" wattage.

Ugh.  No doubt true, but all the GE bulbs at least list both lumens
and expected bulb life.  It's useful to watch out for this when
reading CF advertising literature, because their estimates of the
lumens produced by a "60 watt" bulb often does not match what the 60
watt bulbs in the supermarket say, and the mismatch almost always
favors the CF bulb (e.g., one company's "75 watt equivalent CF" puts
out only as much light as a 60 watt bulb incandescent, at least if you
believe the info provided by GE for the bulb).

Caveat emptor.

Now, can anyone tell me how much light a standard 6-volt bicycle
tail-lamp emits, and (lacking a ready reference) what's the conversion
from lumens to candelas?  I'm trying to compare high-efficiency LEDs
with standard bulbs.

David Chase
Sun