Wattage and Lumens of Various Light Types

A 400 W lamp or 40 W lamp says nothing about how much light it puts out of any kind. Most
lamps use this wattage to drive themselves. On the avg about 75% of the wattage is for
driving it the other 2%% will be actual light output Some of the more hi-tech stuff drives
more light output, as it use less wattage to drive it.A simple way to look at it is to
look at the wattage and the lumen output. A 100 W bulb that has an output of 10,000 lumens
( say a MH) has an EFFICACY of 100 ( 10,000 / 100). A std incandescent. only has an
output of about 10 lumens / W, so you would need a 1,000 W lamp to be equal 100W MH in
lumen output.

But all this is based on the human eye, which is most sensitive to about 540 nm or green
light. You do not see red or blue light well, so when dealing wit actual light output one
needs to look a "Einstein's", a true light measurement of all light. Or a SED( Spectral
Energy Distribution ) Curve ( you know that nice colored rainbow plot you see on some
light bulbs)

Watts / gal is a MEANINGLESS value !! Why ? How deep is the tank, how wide is the tank,
what kind of bulb ( NO, VHO, CF, MH, MV, as they have a different "Point Source") and K
value, what is in the tank, etc..


--
Boomer

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Former US Army Bomb Technician (EOD)
Member; IABTI, NATEODA, WEODF, ISEE & IPS

If You See Me Running You Better Catch-Up


"

But if watage says nothing about how much light it puts
out, then when ever you order a mh light system, and you
are asked what wattage you want, then you would say "It
doesn't matter".

Wayne Sallee


Boomer wrote:
A 400 W lamp or 40 W lamp says nothing about how much light it puts out of any kind. Most
lamps use this wattage to drive themselves. On the avg about 75% of the wattage is for
driving it the other 2%% will be actual light output Some of the more hi-tech stuff drives
more light output, as it use less wattage to drive it.A simple way to look at it is to
look at the wattage and the lumen output. A 100 W bulb that has an output of 10,000 lumens
( say a MH) has an EFFICACY of 100 ( 10,000 / 100). A std incandescent. only has an
output of about 10 lumens / W, so you would need a 1,000 W lamp to be equal 100W MH in
lumen output.

But all this is based on the human eye, which is most sensitive to about 540 nm or green
light. You do not see red or blue light well, so when dealing wit actual light output one
needs to look a "Einstein's", a true light measurement of all light. Or a SED( Spectral
Energy Distribution ) Curve ( you know that nice colored rainbow plot you see on some
light bulbs)

Watts / gal is a MEANINGLESS value !! Why ? How deep is the tank, how wide is the tank,
what kind of bulb ( NO, VHO, CF, MH, MV, as they have a different "Point Source") and K
value, what is in the tank, etc..

Not everyone runs MH and not all MH, at say 400 W, necessarily produce the same amount of
light. As I said, you must of missed it.


EFFICACY = Lumens / Watts

All one has to due is look at any 400 W MH and compare it to 400W Iwasaki. No MH @ 400 W
even comes close to this bulbs light output.


"then you would say "It doesn't matter".

I never said it does not matter. Do not be putting words in my mouth :-) It is misleading.
I said "A 400 W lamp or 40 W lamp says nothing about how much light it puts out of any
kind". . Almost any 175 W MH will _usually_ but _not always _will have more light output
than say a 150 MH


Boomer

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http://www.reefcentral.com/vbulletin/index.php


Former US Army Bomb Technician (EOD)
Member; IABTI, NATEODA, WEODF, ISEE & IPS

If You See Me Running You Better Catch-Up


"Wayne Sallee" wrote in message
ink.net...
: But if watage says nothing about how much light it puts
: out, then when ever you order a mh light system, and you
: are asked what wattage you want, then you would say "It
: doesn't matter".
:
: Wayne Sallee
:
:
: Boomer wrote:
: A 400 W lamp or 40 W lamp says nothing about how much light it puts out of any kind.
Most
: lamps use this wattage to drive themselves. On the avg about 75% of the wattage is for
: driving it the other 2%% will be actual light output Some of the more hi-tech stuff
drives
: more light output, as it use less wattage to drive it.A simple way to look at it is to
: look at the wattage and the lumen output. A 100 W bulb that has an output of 10,000
lumens
: ( say a MH) has an EFFICACY of 100 ( 10,000 / 100). A std incandescent. only has an
: output of about 10 lumens / W, so you would need a 1,000 W lamp to be equal 100W MH in
: lumen output.
:
: But all this is based on the human eye, which is most sensitive to about 540 nm or
green
: light. You do not see red or blue light well, so when dealing wit actual light output
one
: needs to look a "Einstein's", a true light measurement of all light. Or a SED(
Spectral
: Energy Distribution ) Curve ( you know that nice colored rainbow plot you see on some
: light bulbs)
:
: Watts / gal is a MEANINGLESS value !! Why ? How deep is the tank, how wide is the
tank,
: what kind of bulb ( NO, VHO, CF, MH, MV, as they have a different "Point Source") and
K
: value, what is in the tank, etc..
:
:

But lumens is only related to what the eye perceives.

Wayne Sallee


Boomer wrote:


EFFICACY = Lumens / Watts

A 400-watt or 40 watt light bulb in the amount of light put out a silent any kind. Most lamps use power to drive themselves. An average of about 75% of the electricity is carried out its other 2% will be more effective high-tech materials some readers the light output.

This never got posted for some reason

Not everyone runs MH and not all MH, at say 400 W, necessarily produce the same amount of
light. As I said, you must of missed it.


EFFICACY = Lumens / Watts

All one has to due is look at any 400 W MH and compare it to 400W Iwasaki. No MH @ 400 W
even comes close to this bulbs light output.


"then you would say "It doesn't matter".

I never said it does not matter. Do not be putting words in my mouth :-) It is misleading.
I said "A 400 W lamp or 40 W lamp says nothing about how much light it puts out of any
kind". . Almost any 175 W MH will _usually_ but _not always _will have more light output
than say a 150 MH




--
Boomer

Want to talk chemistry ? The Reef Chemistry Forum
http://www.reefcentral.com/vbulletin/index.php


Former US Army Bomb Technician (EOD)
Member; IABTI, NATEODA, WEODF, ISEE & IPS

If You See Me Running You Better Catch-Up


"Wayne Sallee" wrote in message
ink.net...
: But if watage says nothing about how much light it puts
: out, then when ever you order a mh light system, and you
: are asked what wattage you want, then you would say "It
: doesn't matter".
:
: Wayne Sallee
:
:
: Boomer wrote:
: A 400 W lamp or 40 W lamp says nothing about how much light it puts out of any kind.
Most
: lamps use this wattage to drive themselves. On the avg about 75% of the wattage is for
: driving it the other 2%% will be actual light output Some of the more hi-tech stuff
drives
: more light output, as it use less wattage to drive it.A simple way to look at it is to
: look at the wattage and the lumen output. A 100 W bulb that has an output of 10,000
lumens
: ( say a MH) has an EFFICACY of 100 ( 10,000 / 100). A std incandescent. only has an
: output of about 10 lumens / W, so you would need a 1,000 W lamp to be equal 100W MH in
: lumen output.
:
: But all this is based on the human eye, which is most sensitive to about 540 nm or
green
: light. You do not see red or blue light well, so when dealing wit actual light output
one
: needs to look a "Einstein's", a true light measurement of all light. Or a SED(
Spectral
: Energy Distribution ) Curve ( you know that nice colored rainbow plot you see on some
: light bulbs)
:
: Watts / gal is a MEANINGLESS value !! Why ? How deep is the tank, how wide is the
tank,
: what kind of bulb ( NO, VHO, CF, MH, MV, as they have a different "Point Source") and
K
: value, what is in the tank, etc..
:
:

Yea those two posted :-)

Wayne Sallee
Wayne's Pets



Boomer wrote:
This never got posted for some reason

Not everyone runs MH and not all MH, at say 400 W, necessarily produce the same amount of
light. As I said, you must of missed it.


EFFICACY = Lumens / Watts

All one has to due is look at any 400 W MH and compare it to 400W Iwasaki. No MH @ 400 W
even comes close to this bulbs light output.


"then you would say "It doesn't matter".

I never said it does not matter. Do not be putting words in my mouth :-) It is misleading.
I said "A 400 W lamp or 40 W lamp says nothing about how much light it puts out of any
kind". . Almost any 175 W MH will _usually_ but _not always _will have more light output
than say a 150 MH

OK Wayne thanks but I don't have them or can't see them :-(

--
Boomer

Want to talk chemistry ? The Reef Chemistry Forum
http://www.reefcentral.com/vbulletin/index.php


Former US Army Bomb Technician (EOD)
Member; IABTI, NATEODA, WEODF, ISEE & IPS

If You See Me Running You Better Catch-Up


"Wayne Sallee" wrote in message
nk.net...
: Yea those two posted :-)
:
: Wayne Sallee
: Wayne's Pets
:
:
:
: Boomer wrote:
: This never got posted for some reason
:
: Not everyone runs MH and not all MH, at say 400 W, necessarily produce the same amount
of
: light. As I said, you must of missed it.
:
:
: EFFICACY = Lumens / Watts
:
: All one has to due is look at any 400 W MH and compare it to 400W Iwasaki. No MH @ 400
W
: even comes close to this bulbs light output.
:
:
: "then you would say "It doesn't matter".
:
: I never said it does not matter. Do not be putting words in my mouth :-) It is
misleading.
: I said "A 400 W lamp or 40 W lamp says nothing about how much light it puts out of any
: kind". . Almost any 175 W MH will _usually_ but _not always _will have more light
output
: than say a 150 MH
:
:
:
: