Compact Flourescent Lamps

Yes, they do. But they do even better with the 6500K ones. Especially in an aquarium.

Reply to
Larry Blanchard
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We just did a major remodel on our house, garage door openers too. He asked if we had any lamps, he'd put em in while he was up there. Handed him a CFL, he said these were great for places with vibration. Much better then incandescent.

Reply to
Rick Samuel

Based on what I have seen in North Carolina with their little experiment with LED's in stop lights, they have a ways to go....

Maybe down the road but the current versions are not up to the task.

Andrew Barss wrote:

Reply to
Pat Barber

What problem are you seeing? Around here they're being installed on an attrition basis and seem to be working fine.

Reply to
J. Clarke

Only if the CFL was hot when broken and the other items cold.

Wrong.

Mercury liquid and the mercury vapor above it will form an equilibrium that is temperature dependent. As mercury vapor is removed from the air above the liquid more will evaporate until all of the liquid is gone. While the vapor pressure of mercury is low at room temperature, it is readily absorbed into the human body by inhalation, and is not nearly so readily eliminated.

Thus spilt mercury in your environment will continuously accumulate in the persons who breathe the air in the environment until it is all removed from that environment.

Reply to
Fred the Red Shirt

It does indeed 'hover' on my planet. (hint: it has a non-zero vapor pressure.)

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Oxide also readily volatilises.

Reply to
Fred the Red Shirt

They started installing them "about" 4-5 years ago and I have noticed a fairly consistent outage of the individual "lights" that make up the entire signal.

Ex: The green light is made up of several leds and a few will go out after a period of time. I didn't pay much attention to that until I noticed that a LOT of the lights had the same issue.

This might have a LOT to do with the vendor that supplies the lights to the state.

Maybe it's a design feature that keeps the light going even if there is a partial failure ???

J. Clarke wrote:

Reply to
Pat Barber

Exactly. A certain percentage of any electronic component will suffer "infant mortality" (google "bathtub curve" for more information on the statistical pattern) but with an LED array the failure of a few individual LEDs doesn't have any significant effect on function.

Reply to
J. Clarke

Basic problem with a CFL is that it requires "warm up" time which makes it a poor choice for fast response On-Off application like garage door operators.

Better to use a "Rough Service" incandescent lamp.

To qualify as a "rough service" lamp, increase the filament voltage by say 10% which is exactly what a traffic signal lamp is.(130V vs 120V)

Available at any decent electrical distributor.

Lew

Reply to
Lew Hodgett

Different ones behave differently in this regard. I have some CFLs that take a minute to come up to full brightness, and others that come up to near-full-brightness in about a second.

Interestingly, the more expensive ones weren't always better.

Chris

Reply to
Chris Friesen

They've been GREAT here in CT. I'd say we've had them for at least 7-8 years. Did NC pick a crappy supplier?

Also, almost all new aircraft lighting is LED. We replaced our tail "bubble gum machine" last year with an LED strobe. It wasn't cheap, but the performance is terrific.

Reply to
B A R R Y

Even on 10F temps, mine throws enough light to get in and out of the car, as well as park the car. It's noticeable but plenty livable.

Reply to
B A R R Y

Here in AZ, even in the winter, I'm not sure that will be a problem. Hasn't been thus far when using the CFL's as porch lights.

I've got those in the GDO, my thought was that, in this one case, I might actually be able to get 60 watts or more of theoretical light from a fixture that specifies the need for low wattage.

Reply to
Mark & Juanita

At 1,000 ft, a flying red horse won't see the difference.

Lew

Reply to
Lew Hodgett

Reply to
Pat Barber

No slow warm up, they come on about a 1/2 second after the button is pushed. May be different in winter, but winter is mild in the TX Hill Country.

Reply to
Rick Samuel

Be careful with the term "full spectrum". It is a misleading marketing term used to advertise many bulbs that are far short of better light.

Technically, CRI (Color Rendering Index) is the accuracy with which a light matches it's reference, usually daylight. No bulb less than 90 should be called "full spectrum", although many are. (A quick search finds numerous examples with CRI of 75!)

In short: use bulbs >95 CRI and temperature 5,000-5,5000K for the fullest and most accurate range of light in the same band as daylight.

Reply to
digitect

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