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03-31-2007, 07:23 PM
#1
03-31-2007, 07:46 PM
#2
Registered User
8000K produces less light than the stock 4300K.
the high the K the less light outut. also the higher the K the more blue/purple color you will get, which is probably why you went with 8000K anyway.
the high the K the less light outut. also the higher the K the more blue/purple color you will get, which is probably why you went with 8000K anyway.
03-31-2007, 09:02 PM
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Originally Posted by sequoia
it's because you used 8000k bulbs. nice color, poor output. i'd go with 6000k but 8000k look awesome. pics?
03-31-2007, 09:14 PM
#6
Originally Posted by rbf351
8000K produces less light than the stock 4300K.
the high the K the less light outut.
the high the K the less light outut.
A quick examination of Stefan-Boltzmann's law reveals that the total radiant exitance (band-integrated) of a 8000k source is 2.3 x 10 ^8 watts/meter^2 (assuming an emissivity of 1). On the other hand, the band-integrated radiant exitance of a 4300k source is 1.9 x 10 ^ 7 watts/meter^2. The "input power" is irrelevant - it takes x-amount of energy to produce an 8000k source if the source is a blackbody or a greybody.
However, arc-lamps are defined as "selective radiators" with wavelength-dependent emissivity. The radiance quantity (watts/meter^2-steradian-micron) is the product of the blackbody radiation at the same temperature with the respective spectral emissivity.
We can use wien's law to determine that the peak output of any 8000k source (blackbody, greybody, or selective radiator) is 362nm. The peak wavelength humans can generally see is 350nm. 6000k has a peak wavelength emission of 483nm, which is somewhere between yellow and blue (this is roughly the emission temperature of the sun). Therefore, we can see that any increase in temperature would result in a shifting of peak output to the blue. An increase of temperature that's too high would result in a large amount of the spectral radiant exitance existing beyond the human perception.
Conclusion: as a result of the frequency-dependent emissivity being lower for the 8000k source, as well as much of the output energy being beyond human vision limits, the 8000k source appears to be dimmer. I'd stick with HIDs in the ~6000k range if you are interested in aftermarket.
(i'm getting a master's degree in optical science from the university of arizona and i've been doing homework all weekend... oops
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03-31-2007, 09:16 PM
#7
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Originally Posted by Desert_TL
This is not true. The output of a "temperature" source (such as blackbody or greybody in this case) is determined by Planck's Law. The spectral radiant exitance (output) of a higher temperature source is higher over ALL wavelengths and is measured in watts/meter^2-micron.
A quick examination of Stefan-Boltzmann's law reveals that the total radiant exitance (band-integrated) of a 8000k source is 2.3 x 10 ^8 watts/meter^2 (assuming an emissivity of 1). On the other hand, the band-integrated radiant exitance of a 4300k source is 1.9 x 10 ^ 7 watts/meter^2. The "input power" is irrelevant - it takes x-amount of energy to produce an 8000k source if the source is a blackbody or a greybody.
However, arc-lamps are defined as "selective radiators" with wavelength-dependent emissivity. The radiance quantity (watts/meter^2-steradian-micron) is the product of the blackbody radiation at the same temperature with the respective spectral emissivity.
We can use wien's law to determine that the peak output of any 8000k source (blackbody, greybody, or selective radiator) is 362nm. The peak wavelength humans can generally see is 350nm. 6000k has a peak wavelength emission of 483nm, which is somewhere between yellow and blue (this is roughly the emission temperature of the sun). Therefore, we can see that any increase in temperature would result in a shifting of peak output to the blue. An increase of temperature that's too high would result in a large amount of the spectral radiant exitance existing beyond the human perception.
Conclusion: as a result of the frequency-dependent emissivity being lower for the 8000k source, as well as much of the output energy being beyond human vision limits, the 8000k source appears to be dimmer. I'd stick with HIDs in the ~6000k range if you are interested in aftermarket.
(i'm getting a master's degree in optical science from the university of arizona and i've been doing homework all weekend... oops )
A quick examination of Stefan-Boltzmann's law reveals that the total radiant exitance (band-integrated) of a 8000k source is 2.3 x 10 ^8 watts/meter^2 (assuming an emissivity of 1). On the other hand, the band-integrated radiant exitance of a 4300k source is 1.9 x 10 ^ 7 watts/meter^2. The "input power" is irrelevant - it takes x-amount of energy to produce an 8000k source if the source is a blackbody or a greybody.
However, arc-lamps are defined as "selective radiators" with wavelength-dependent emissivity. The radiance quantity (watts/meter^2-steradian-micron) is the product of the blackbody radiation at the same temperature with the respective spectral emissivity.
We can use wien's law to determine that the peak output of any 8000k source (blackbody, greybody, or selective radiator) is 362nm. The peak wavelength humans can generally see is 350nm. 6000k has a peak wavelength emission of 483nm, which is somewhere between yellow and blue (this is roughly the emission temperature of the sun). Therefore, we can see that any increase in temperature would result in a shifting of peak output to the blue. An increase of temperature that's too high would result in a large amount of the spectral radiant exitance existing beyond the human perception.
Conclusion: as a result of the frequency-dependent emissivity being lower for the 8000k source, as well as much of the output energy being beyond human vision limits, the 8000k source appears to be dimmer. I'd stick with HIDs in the ~6000k range if you are interested in aftermarket.
(i'm getting a master's degree in optical science from the university of arizona and i've been doing homework all weekend... oops
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03-31-2007, 10:24 PM
#9
acura-cl.com OG
i am assuming that you installed these in your fog lamps (i don't think eurolite makes D2S bulbs?) If so, replace them with something decent. nokya, polarg and piaa make nice halogen bulbs.
4300K is the best all around for color/brightness. i am running 6000K D2S's and 3000K 9006 (fogs)
4300K is the best all around for color/brightness. i am running 6000K D2S's and 3000K 9006 (fogs)
03-31-2007, 10:25 PM
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Originally Posted by ding069
i am assuming that you installed these in your fog lamps (i don't think eurolite makes D2S bulbs?) If so, replace them with something decent. nokya, polarg and piaa make nice halogen bulbs.
4300K is the best all around for color/brightness. i am running 6000K D2S's and 3000K 9006 (fogs)
4300K is the best all around for color/brightness. i am running 6000K D2S's and 3000K 9006 (fogs)
03-31-2007, 10:34 PM
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03-31-2007, 10:38 PM
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03-31-2007, 10:41 PM
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03-31-2007, 10:43 PM
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03-31-2007, 10:45 PM
#17
mmmmmm....
Originally Posted by bcbtony
So 6000k is the best to go and what brand do you recommend? it didnt really turn purplish blue it was white
03-31-2007, 11:01 PM
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Originally Posted by BAO-7786
Because it's only 35W bulb... and HID needs 65W to start up.
I have a set of HIDs in my garage.. I didn't install it because of this wire issue...
T_T
03-31-2007, 11:35 PM
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Originally Posted by rockyfeller
eurolite makes those painted halogen/xenon bulbs with "HID" labelling. Are you talking about incandescent lights or true HID bulbs here?
04-01-2007, 05:25 PM
#23
Originally Posted by bforbrian
totally fluffed and unnecessary but I actually follow what you're saying
i finished planck's law, etc last semester and am doing magnetic flux and induction right now.. physics at cornell is baaaaaaaaaad
i finished planck's law, etc last semester and am doing magnetic flux and induction right now.. physics at cornell is baaaaaaaaaad
after sleeping on my last comment, basically all i was trying to say is that you can have two bulbs, both labeled "8000k", but the output can look completely different; they'll both have peak output at the 8000k color temperature, but depending on the emissivity, one bulb could have higher total output or have additional output in the 500nm range, making the light appear to be much brighter. so i would say that you definitely get what you pay for. just like comparing the wattage rating of two different audio amps; there are a million different ways to measure wattage and that's why a "500 watt" JL amp easily outperforms a "500 watt" radio shack amp even though they have the same so-called power output.
so again, you can have two bulbs, both labeled 8000k, from different manufacturers, and they can have completely different outputs and brightnesses depending on the quality (or mathematically speaking, the emissivity)
04-02-2007, 01:34 AM
#24
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i bought the nokya yellow 2500K ones off of ebay. they fit nicely and they are a deep rich yellow. i wanted blue so i bought some 8500k euro designz, but they are like a weak white color. can anyone recommend one that will put out a nice blue? i'm currently pondering some 600k blue luminics but previous posters said that they don't fit that great into the fog light mount.
04-02-2007, 11:58 PM
#26
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Originally Posted by wasupdog
i bought the nokya yellow 2500K ones off of ebay. they fit nicely and they are a deep rich yellow. i wanted blue so i bought some 8500k euro designz, but they are like a weak white color. can anyone recommend one that will put out a nice blue? i'm currently pondering some 600k blue luminics but previous posters said that they don't fit that great into the fog light mount.
04-03-2007, 01:50 PM
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Originally Posted by Distorted Reality
I just purchased some luminics 6000k bulbs, people have had problems with them? How so?
04-03-2007, 01:56 PM
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Try http://www.hoen-usa.com/ for HID Match bulbs. I've heard really good things about there bulbs and have had experience with their Endurance bulbs.
04-04-2007, 05:17 PM
#33
iScrape going into
Originally Posted by wasupdog
some said that the fit into the mount wasn't so good causing water to get into the housing. well, we're in the same boat cus i just bought some luminics 6k too. i really couldn't find another semi-cheap <50$ ones that were gonna be a nice blue color.
-Jay
04-04-2007, 06:08 PM
#34
Originally Posted by wasupdog
i bought the nokya yellow 2500K ones off of ebay. they fit nicely and they are a deep rich yellow. i wanted blue so i bought some 8500k euro designz, but they are like a weak white color. can anyone recommend one that will put out a nice blue? i'm currently pondering some 600k blue luminics but previous posters said that they don't fit that great into the fog light mount.
04-04-2007, 06:59 PM
#35
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yea, my 4300k yellow nokyas are bright as hell which is cool. i know that blue will cause more eye fatigue than a yellow hue (scientific fact i read somewhere) but i'm just going for looks.
Hey distorted reality, these things only take like 5 minutes to install after u remove the air intake box. i have a cold air intake so there really is nothing in the way. i don't know whether you want to put sealant on it, it will make it hella hard to remove later on i am guessing. i'm just gonna install mine when i get them and see how it is.
Hey distorted reality, these things only take like 5 minutes to install after u remove the air intake box. i have a cold air intake so there really is nothing in the way. i don't know whether you want to put sealant on it, it will make it hella hard to remove later on i am guessing. i'm just gonna install mine when i get them and see how it is.
04-04-2007, 07:18 PM
#36
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Originally Posted by wasupdog
yea, my 4300k yellow nokyas are bright as hell which is cool. i know that blue will cause more eye fatigue than a yellow hue (scientific fact i read somewhere) but i'm just going for looks.
Hey distorted reality, these things only take like 5 minutes to install after u remove the air intake box. i have a cold air intake so there really is nothing in the way. i don't know whether you want to put sealant on it, it will make it hella hard to remove later on i am guessing. i'm just gonna install mine when i get them and see how it is.
Hey distorted reality, these things only take like 5 minutes to install after u remove the air intake box. i have a cold air intake so there really is nothing in the way. i don't know whether you want to put sealant on it, it will make it hella hard to remove later on i am guessing. i'm just gonna install mine when i get them and see how it is.
04-07-2007, 11:56 PM
#38
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I installed my 6000k luminics bulbs yesterday. And so far haven't had one problem with them causing condensation in my headlamps at all, when I put them in seemed like it was a tight seal so knock on wood that nothing happens to them. But in my opinion they look great, and I am pleased with them so far.
-Jay
-Jay
04-08-2007, 03:32 AM
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ok, my luminics came in the mail but i gotta go pick them up at the post office on monday. how do they look? are they bright and do they have a deep blue look? they better not be like the crappy ass euro designz i bought on fleabay lol.