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Posted by Don Klipstein on February 26, 2007, 11:43 pm
>>I have been replacing my 60s with cfl 13 which say they are
>> equivalent, they are not the 60 is much brighter. Has anyone else noted
>> this?
>
>My cfls take about 15 minutes to be fully bright. Give them some time.
That sounds unusually long to me. In my experience, CFLs usually take
half a minute to a minute to get close enough to full brightness.
Outdoor types in colder temperatures can take 5-10 minutes to get
warmed up.
- Don Klipstein (don@misty.com)
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Posted by Joseph Meehan on February 26, 2007, 9:28 pm
allan wrote:
> I have been replacing my 60s with cfl 13 which say they are
> equivalent, they are not the 60 is much brighter. Has anyone else
> noted this?
It seems to vary greatly depending on the specific CF, the temperature,
the length of time it has been on and the actual voltage.
Frankly all the CF I have bought recently seem brighter than claim to me,
at least once the warm up. I kind of like that slightly less bright light
and a gradual brightening.
--
Joseph Meehan
Dia 's Muire duit
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Posted by Shaun Eli on February 26, 2007, 9:45 pm
The really cheap ones don't seem as bright as they claim.
The nicer ones I bought at Home Depot (instead of the dollar-type
discount store) seem to match the brightness they claim.
But yeah, you'll still save tons of money if you go one category
brighter in a CFL vs. regular bulb.
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Posted by Don Klipstein on February 26, 2007, 11:59 pm
>The really cheap ones don't seem as bright as they claim.
>
>The nicer ones I bought at Home Depot (instead of the dollar-type
>discount store) seem to match the brightness they claim.
I would avoid the dollar store ones as if they were fleas and
mosquitoes!
I have tested 57 "models" of I forget how many "brands" (maybe 18-19 or
so), and found 100% of the ones making claims of light output to fall
significantly short - in a few cases by a factor of at least 3!
Additional issues with the "dollar store" CFLs according to my
experience:
1) The color is usually an icy cold bluish white "daylight". Some models
in packages claiming "soft warm white light" have the icy cold bluish
white color.
2) Of the minority that actually has a "warm white" color, most have low
color rendering index.
3) Defect rate is higher than that of other CFLs, and failures are more
likely to be spectacular.
========================
Next down the line, my experience with Lights of America has a high rate
of early failures and a high rate of light output falling short of claims
to an extent that I consider significant, although nothing like the dollar
store junkers.
After that, I have found the "Maxlite" brand to have a significant
rate of falling short of claimed light output, although mostly slightly
although I had one model do so more badly.
After that, the GE FLB15 (early 1990's) fell significantly short of
claimed light output in my experience.
Another note - Many PL/twintube types had light output exaggerated by
8-9%, and the major name brands backed down their light output claims of
many models of these by about 8% several years ago. Consider 820-825
lumens from a PL-13 realistic and 900 lumens from such to be what the
major manufacturers had to back down from.
- Don Klipstein (don@misty.com)
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Posted by mm on February 27, 2007, 12:28 am
On 26 Feb 2007 18:45:29 -0800, "Shaun Eli"
>The really cheap ones don't seem as bright as they claim.
>
>The nicer ones I bought at Home Depot (instead of the dollar-type
>discount store) seem to match the brightness they claim.
On two occasions I bought one at a dollar store, and I finally solved
my problem by using one of those 2 sockets in one, and running them at
the same time, in the basement. They're bright enough that way.
>
>But yeah, you'll still save tons of money if you go one category
>brighter in a CFL vs. regular bulb.
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