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Charlie said:
"Hey Scott,
A couple of follow-ups if you don't mind:
1. What kind of light do you think
delivers the most continuous wavelengths of 600nm--820nm light?
a. halogen
b. regular incandescent
c. incandescent, infrared
2. Dr. Ray Peat thinks that an infrared, 130 volt bulb, run at 120 volts,
gives off the the best balance (strongest & most continuous) of 600-820nm light.
Does this make sense to you?"
"When you consider that halogen is between the sun and incandescent, and
then look at my chart below, then you cann see halogen is the best.
Likewise, if you consider that heat lamps are shifted further to the
right, then you can see they are not even as good as incandescent, let
alone halogen. You can't even see red of most heat lamps, which shows
they provide zero from 600 to 700 nm. Even 800 nm would glow red.
http://heelspurs.com/a/led/BLACK.gif"
"Yes, Scott, that sure would seem to be true--based on your chart.
Can you imagine a significant shift in an infrared bulbs wavelengths
caused by running a 130V (infrared) bulb at 120V...?"
"That makes it even cooler than normal which means more far infrared that
only heats the skin."
narouz said:As it stands now,
I'm inclined to trust Peat on the "red light," 600-820nm wavelengths
being the best.
But in terms of how one gets a bulb best designed to produce those wavelengths...
I'm more inclined to go in the direction of regular incandescents
and possibly the halogens.
Charlie said:Oh, so we are back to incandescents now? And possibly halogen. Maybe a mixture of the two would be optimal. :hanginground
Not to confuse more, but when I was researching halogens they have different ones that burn at different levels so that would affect the wavelengths to.
I am hoping one day we could without a doubt name the light that is needed, and I hope that day is soon cause winter is almost here!!!!
narouz said:To my (admittedly limited :) ) mind,
Peat is recommending 2 things which are in conflict.
He says 600-820nm wavelengths are what we're after.
But the bulb he recommends doesn't seem to get us there.
"Plain incandescent bulbs are o.k., but the best kind are used by farmers for incubators, etc., and are designed as 130 volt bulbs, so when they operate on 120 volts they have a bias toward the longer wave red color, and they have an internal reflector. They are often called "infrared" or "heat lamps," but they have a clear glass front."--Dr. Ray Peat
kiran said:narouz said:To my (admittedly limited :) ) mind,
Peat is recommending 2 things which are in conflict.
He says 600-820nm wavelengths are what we're after.
But the bulb he recommends doesn't seem to get us there.
You're forgetting something. Peat says blue light causes damage to the retina, and is stressful.
So it's not just about maximizing 600-820nm, you also want to keep the amount of higher frequencies like blue light low. That's the purpose of the IR lamp. I'm pretty sure halogens generate more UV radiation, and are generally more blue.
--Scott"Yes. Terminology: Running an incandescent light intended for 130V at 120V
is called running a heat lamp at its intended 120V. You would not run a
130V heat lamp at anything because you won't be able to buy a 130 V heat
lamp. You can buy a 130V incandescent but that don't call it that; they
call it a 120V heat lamp."
Hello,
Thank you for contacting www.lightbulbemporium.com
Yes, it is a heat lamp. It is not an infrared lamp. The light emitted is visible.
Typically, they are used in bathrooms and spas to provide heat when people are getting in and out of a shower or bath. There is also a coated version which is used to keep food warm.
When operated at 120V, a 130V lamp will emit approximately 10% less light than when run at 130V. However, it will also last 10-15% longer.
Sincerely,
Mike Jordan
www.lightbulbemporium.com
narouz said:On the specific bulb some have put forward as the ideal Peat Light,
the Bulbrite 250BR40H
at http://www.lightbulbemporium.com/bulbrite_714025_250br40h.asp
which is described on their site like this:
"250 Watt 130 Volt BR40 E26 Medium Base (Standard Base) Clear Heat Lamp"
I asked in an email about the bulb.
Here is what I asked:
"1. It is, primarily, a Heat Lamp, right?
2. Could it also be called an Infrared Lamp?
3. Does it put out any visible light?
4. What do people buy these for? heating animals? heating areas inhabited by humans? other?
5. If I run one of these in USA at 120volts (they are said to be 130volts), how will that affect the bulb's output?"
A Mike Jordan answered as follows:
Hello,
Thank you for contacting http://www.lightbulbemporium.com
Yes, it is a heat lamp. It is not an infrared lamp. The light emitted is visible.
Typically, they are used in bathrooms and spas to provide heat when people are getting in and out of a shower or bath. There is also a coated version which is used to keep food warm.
When operated at 120V, a 130V lamp will emit approximately 10% less light than when run at 130V. However, it will also last 10-15% longer.
Sincerely,
Mike Jordan
http://www.lightbulbemporium.com
For what it's worth.
More data to mull.
"The specifications for the bulb are based on 120V, so if you run it at
130V, it is probably a regular incandescent bulb instead of acting like a
heat lamp. They are wrong, most of the light energy is in the infrared
even though it is very bright white light too. It will work, just not as
good as an incandescent or a halogen. If you get it, get the red version
of that model. It's not as bright to the eyes and has a "neater" feel to
it. I have about 5 different types of these that I acquired before I
realized halogens are best."
And Scott replied:"So Scott,
Bottom line:
With regard to this specific (Bulbrite heat lamp, 130V run at 120V) bulb
which many regard as Dr. Peat's recommended red light bulb,
what I hear you saying is
that it is nothing special in terms of producing the 600-820nm wavelengths
noted by Peat to be the most healthy.
Actually, you seem to say it is pretty weak in those wavelengths,
and that both regular incandescents and even moreso halogens
are much stronger and more continuous in that 600-820 spectrum...
right?
(Not trying to put words in your mouth.
Just trying to make it easy for you to reply without a lot of work:>))"
"Yes."
narouz said:On the specific bulb some have put forward as the ideal Peat Light,
the Bulbrite 250BR40H
at http://www.lightbulbemporium.com/bulbrite_714025_250br40h.asp
which is described on their site like this:
"250 Watt 130 Volt BR40 E26 Medium Base (Standard Base) Clear Heat Lamp"
I asked in an email about the bulb.
Here is what I asked:
"1. It is, primarily, a Heat Lamp, right?
2. Could it also be called an Infrared Lamp?
3. Does it put out any visible light?
4. What do people buy these for? heating animals? heating areas inhabited by humans? other?
5. If I run one of these in USA at 120volts (they are said to be 130volts), how will that affect the bulb's output?"
A Mike Jordan answered as follows:
Hello,
Thank you for contacting http://www.lightbulbemporium.com
Yes, it is a heat lamp. It is not an infrared lamp. The light emitted is visible.
Typically, they are used in bathrooms and spas to provide heat when people are getting in and out of a shower or bath. There is also a coated version which is used to keep food warm.
When operated at 120V, a 130V lamp will emit approximately 10% less light than when run at 130V. However, it will also last 10-15% longer.
Sincerely,
Mike Jordan
http://www.lightbulbemporium.com
For what it's worth.
More data to mull.