My back hall is very cold and when I first turn on the CFL it gives
almost no illumination at all...even after a few minutes it still does
not come up to full brilliance. That said...they are an improvement
over the original ones.
Thanks for the info, next time I go to Home Depot I will get a few and
try them out.
I have been using CFL bulbs in our outdoor fixtures for the last several
years. While the fixtures are mostly weather tight, they are open on the
bottoms. I honestly did not expect the CFL's to last outdoors, but I think
I've only replaced one of them in the last five years.
The outdoor CFL's are generally quite dim when they first come on, and it
can take several minutes for them to reach full brightness. Especially if
it is really cold outside. But, the lights are on timers, so they usually
come on an hour or more before we need them. Since these lights are on
several hours each day, the energy savings has been worth it.
I will probably try the CREE LED bulbs in the outdoor fixtures when the
CFL's die just to see if they work OK.
Lots of LED fixtures, bulbs and controls are now available for residential
applications. There's a catalog of the best ones at
www.lightingfortomorrow.com based on an annual competition. LED fixtures
started showing up in 2006.
On 12/14/2013 10:15 AM, Unquestionably Confused wrote:
This is true. I do so little cooking on the stove top, that I'm not
really concerned about the heat issue, but the HD guy did make me wonder
if that was a valid concern should I ever get the urge to cook. And yes,
I'm more interested in the longevity/positioning angle.
Maybe I'll just go stock up on some more incandescent bulbs, since for
now I'm keeping a stock pile to use with my X10 modules.
IMPORTANT point. Range hoods that have a switch that changes the lights
from bright to dim just switch a diode in and out of the circuit. In the
dim mode, that operates the bulbs on half-wave dc. The electronics inside a
CFL bulb won't like that at all.
On half-wave dc, incandescent bulbs draw half power which results in roughly
1/3 the rated light output.
It is all about the vector. I know of a Indian tribe that mined
mercury. They died. Liquid mercury does not have an easy vector
into the body unless ingested/inhaled. Handling the stuff without
protection over a period of years will have harmful effects.
Lewis and Clark took doses of liquid mercury on their 1804 western
expedition as a laxative. Clark lived to be 68; Lewis died, probably of
suicide, at 35. One biography says that he suffered from alcoholism,
depression and perhaps syphilis or malaria. Was mercury involved? There's
some talk of exhuming his body. Maybe we'll find out.
I've been exposed to liquid mercury and mercury vapor for almost 40 years
because I worked where fluorescent lamps were tested and manufactured. I've
also got several mercury amalgam fillings. Now at 75, there's nothing in my
medical history indicating any health issues from mercury. All that I've
read says that it's mercury compounds and especially methy mercury that does
the damage. The Berkeley dudes who wrote the article at:
it right in my view. They say that breaking a CFL results in exposure to
mercury that is about 1/50 of what you get by eating a "single nibble" of
Albacore tuna. How many of you have been around the broken pieces of a
4-foot fluorescent bulb or worse, an 8-foot fluorescent? If so, those bulbs
can contain up to 1,000 times more mercury than a CFL.
On Saturday, December 14, 2013 9:40:07 AM UTC-5, Lee B wrote:
I would agree with the folks at HD. It might work, but for how long
depends on the heat. Is it a gas range or electric? Gas would be
worse. Having it mounted sideways is OK, it's upside down that some
of them don't like. Covering it up adds to the heat issue, at least
usually. In your case, it might help. If it's covered up, it then
depends on how much air is inside the enclosure, can some air get in from
behind to move heat, etc. I have a 100W CFL in an enclosed globe
fixture under a fan and it's lasted a very long time. I've had
others that have failed early that were not in enclosures, so who
knows. A lot also depends on the particular bulb. Which ones are
good, who knows.
On Saturday, December 14, 2013 8:40:07 AM UTC-6, Lee B wrote:
We have a non-vented hood and we cook a lot...and I have had a CFL uncovered in the hood for many years (I think replaced once in a span of 5 years).
I never use the fan...so heat and steam from cooking doesn't seem to be a problem.
If yours' is covered, heat may build-up more.
I have had a CFL in my range hood for 3 plus years. Zero issues with it and
I have yet (knocking on wood) to have to replace it. CFL's are a crapshoot.
GE and Phillips are now manufactured in China, I believe. The quality control
from anything in China is suspect, at best. My experience with those brands
is more on the disappointing side. However, at the box stores they are the
brand that usually has the cheap multi-packs for sale. One might get lucky
with them and have an attrition rate that is acceptable.
I have not purchased a CFL in quite some time. All of the ones I currently have
are at least 3 years old. From what I hear Sylvania has the best quality, along
with the highest pricing. So, choosing brand is your only concern. My friend
is switching out to LED's, and I am quite surprised on how bright they are.
As for mercury? Worrying about one breaking is rather pointless. I have never
heard of a lamp breaking on its own, and unless you are doing Ginsu maneuvers
on the stove, concerns are minimal. Not to diminish the threat, but trace
mercury exposure from a CFL seems a bit harmless. Repetitive exposure is
what will give you heavy metal poisoning, not a one time trace amount.
Clean up of the problem, if it happens, is rather easy. "Proper" disposal
is something else. Unless you keep the light on 24/7, just use a regular
lamp or get a small, encased under cabinet fixture. Those lamps are cheap
and if they burn out, replace.
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