On 11/30/2010 5:17 AM, Christopher E. Brown wrote:
> On Mon, 29 Nov 2010, Andy wrote:
>
>> They are fairly cheap here. But I haven't bought any in years ...
>> haven't needed to!
>
> And that is I think the diff.
>
>
> Of my few remaining CFLs most are 5 - 7 years old, and appear to be much
> better construction than the newer ones (precision molded higher density
> plastic housing, etc.
>
>
> All of the noise and issues fall into place if you keep in mind...
>
>
Jut the opposite here. The newer ones are cheaper, but last longer, get
up to full brightness faster, and handle low temperatures better. I
have 4 200 watt CFLs in the garage and they are doing just fine. Yes,
in the cold weather (30s "F" and lower" they do take two or three
minutes to come up to full brilliance. The only drawback is the high
wattage CFLs are still expensive.
LEDs are great if properly implemented. Unfortunately many of the newer
ones are not and they really do need a power supply of sorts to operate.
sure you could put a diode and resistor in series with it, but then the
resistor would be doubling the power required albeit the lamp and
resistor would still be far less power than the incandescent.
73
Roger (K8RI)
> Expensive product going into low cost mass production in china.
>
>
> Build a switch mode power supply equiv for the ballast, try to make it the
> diameter of a quarter by 1/2 inch tall, then try to mass produce for
> pennies.
>
>
> All of mine started as cool running and fairly quiet. No noise unless a
> pickup loop was close to the bulb, then sounded like a low power switcher.
>
>
> Most (at least 80%) of the ones that started making noise
>
>
> Showed obvious signs of progressive P/S failure and heating (case running
> very warm to spots on case showing discoloration from heat)
>
> OR
>
> Were making much louder humming noise.
>
>
> Signs of a failing power supply.
>
>
>
>
> Other than the issue of finding bulbs with a high CRI, I have no issues
> with FL fixtures. A good quality filtered electronic ballast and all is
> good. Its trying to cram it all into the base of an screw in bulb that is
> an issue.
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