zacharytrimble
New member
Sorry if this has already been mulled over...search engine is loaded...why not halogen?
Zach
Zach
Why not Halogen?
- Thread starter zacharytrimble
- Start date
hahnmeister
In Memoriam
halogens, like tungstens, have mostly all red-green spectrum, with very little blue. For corals, we need less red-green, and more blue. As of yet, Tungstens and halogens are not effective ways to produce blue light.
BurntOutReefer
New member
Halogen (for non-auto) :
There are no correct K rating bulbs (yet).
In the auto world, there are now 6500K- 10K and 12K bulbs, (both halogen and HID) coming on the market......
its just a matter of time before halogen bulbs for "home" use make the transition. 65K and above lighting is become quite popular in Europe, so its is just a matter of time before people like GE, Phillips, and Osram make the transtion.....
just a matter of some time
There are no correct K rating bulbs (yet).
In the auto world, there are now 6500K- 10K and 12K bulbs, (both halogen and HID) coming on the market......
its just a matter of time before halogen bulbs for "home" use make the transition. 65K and above lighting is become quite popular in Europe, so its is just a matter of time before people like GE, Phillips, and Osram make the transtion.....
just a matter of some time
BeanAnimal
Premium Member
I don't care what they do in "europe", yellowish lighting has never been popular and never will be 
The problem is whith the color of the arc and the efficiency curve of the lamp. Lamps for cars do not need to be efficient or last that long. They are also not "cheap" for what they are.
Anyway, I would not get your hopes up on "blue" halogen aquarium lamps...
Bean
The problem is whith the color of the arc and the efficiency curve of the lamp. Lamps for cars do not need to be efficient or last that long. They are also not "cheap" for what they are.Anyway, I would not get your hopes up on "blue" halogen aquarium lamps...
Bean
BurntOutReefer
New member
"yellowish lighting has never been popular and never will be "....
well...then someone needs to tell XM and the rest of the MH lighting world to stop making 65K bulbs then.......
well...then someone needs to tell XM and the rest of the MH lighting world to stop making 65K bulbs then.......
hahnmeister
In Memoriam
Uh, transition to what? I doubt it.
Tungsten and halogen bulbs are going to be deep-6'ed in the near future I bet. Phosphor and HID bulbs make a good 6-10x the output per watt. Those cars that have bluer lamps are actually not tungsten at all, they are HID... mini halides with their own little ballasts.
Tungsten bulbs and halogens CAN and DO generate some blue light, but exciting a metal filament to get bluer light would cost too many watts to get too little light. HID and phosphor based lamps are just able to do it better. The key is in the voltage, ie: the ballast, as well as the frequency. Bluer light is easier to produce as you get higher in frequency and voltage... tungsten and halogen bulbs dont even have a ballast, so they are good for green-red light only, and even put out alot of IR as well. If you were to have a halogen bulb that was blue, its output would be dismal... Im talking 100watt bulbs that are duller than 20 watters. Theres no point... esp not with LEDs in the near future that will kill the output of even halides.
Tungsten and halogen bulbs are going to be deep-6'ed in the near future I bet. Phosphor and HID bulbs make a good 6-10x the output per watt. Those cars that have bluer lamps are actually not tungsten at all, they are HID... mini halides with their own little ballasts.
Tungsten bulbs and halogens CAN and DO generate some blue light, but exciting a metal filament to get bluer light would cost too many watts to get too little light. HID and phosphor based lamps are just able to do it better. The key is in the voltage, ie: the ballast, as well as the frequency. Bluer light is easier to produce as you get higher in frequency and voltage... tungsten and halogen bulbs dont even have a ballast, so they are good for green-red light only, and even put out alot of IR as well. If you were to have a halogen bulb that was blue, its output would be dismal... Im talking 100watt bulbs that are duller than 20 watters. Theres no point... esp not with LEDs in the near future that will kill the output of even halides.
hahnmeister
In Memoriam
Ive never heard of a 65K bulb before. The highest I have seen is a 50,000K, but 65,000K... wow. Or do you mean 65K? That would have to be some red laser or IR light, no? :bum: Oh, you must mean 6.5K.... he he he...
XM doesnt make a 6500K... they start at 10,000K. FWIW, most aquarium branded bulbs are 10,000K and up (unless they are for planted tanks). Those 6500K bulbs were never intended for aquarium use when designed. Most halides are intended for other uses like 3000Ks for warehouse lighting, 6500Ks for hydroponics, etc. At that, planted tanks do very well with 5000-6500Ks, but for reefs... not so good. You are forgetting that halides were around long before the idea of putting them over a reef tank started.
FWIW, someone tried to make a 'reef halogen' once... Mark Weiss I believe. It flopped.... flopped hard.
BeanAnimal
Premium Member
We should also note that the "K" rating of the bulb that is printed on the side of the box does not really mean anything relevant. It may give you an idea of the "overall" bulb color, but that is it. Take 10 different brands of 10,000K bulbs and none will be "10,000K".
Bean
Bean
BurntOutReefer
New member
65K=6500K...just lazy to put the other 00's in.
XM was used as an example of bulb distributors....lets use Iwasaki instead....
MH was used as an example....lets just use "aquarium lighting world" instead....PC/T5/ etc
How many of them make/distribute 6500K bulbs?
I have (and still use) 6500K for my reef.
Quote from a pretty popular site:
"We believe the best curve is the 6500K bulbs followed by the 10,000K German. "
I'm sure that there are tons of hobbyists who favor 6500K......
XM was used as an example of bulb distributors....lets use Iwasaki instead....
MH was used as an example....lets just use "aquarium lighting world" instead....PC/T5/ etc
How many of them make/distribute 6500K bulbs?
I have (and still use) 6500K for my reef.
Quote from a pretty popular site:
"We believe the best curve is the 6500K bulbs followed by the 10,000K German. "
I'm sure that there are tons of hobbyists who favor 6500K......
pjf
Premium Member
Lumens per Watt
Lumens per Watt
Halogen reflector lamps generate ~20 lumens per watt (http://www.lrc.rpi.edu/programs/lightingTransformation/residentialLighting/lamp/reflector.html).
T5 & T5HO lamps are 5 times more efficient and produce 90-100 lumens per watt (http://www.lrc.rpi.edu/programs/nlpip/lightingAnswers/lat5/pc1a.asp).
Fluorescent and metal halide lamps have another advantage over halogen lamps: there is no filament to burn out.
Lumens per Watt
Halogen reflector lamps generate ~20 lumens per watt (http://www.lrc.rpi.edu/programs/lightingTransformation/residentialLighting/lamp/reflector.html).
T5 & T5HO lamps are 5 times more efficient and produce 90-100 lumens per watt (http://www.lrc.rpi.edu/programs/nlpip/lightingAnswers/lat5/pc1a.asp).
Fluorescent and metal halide lamps have another advantage over halogen lamps: there is no filament to burn out.
BurntOutReefer
New member
yes...all nice and dandy....
this could gone on all day...i.e.
"Fluorescent and metal halide lamps have another advantage over halogen lamps: there is no filament to burn out."...
correct...but they have a ballast that can burn out....and they have a very short use life...
so, back to the original question...why not halogens...
you got your answer OP I hope....
this could gone on all day...i.e.
"Fluorescent and metal halide lamps have another advantage over halogen lamps: there is no filament to burn out."...
correct...but they have a ballast that can burn out....and they have a very short use life...
so, back to the original question...why not halogens...
you got your answer OP I hope....
hahnmeister
In Memoriam
Since when do halides and T5s have short lived ballasts? My halides are going on 5 years...
pjf
Premium Member
Lexus LS 600hl
Lexus LS 600hl
Lexus LS 600hl
Halogen lighting is in home and in auto use now. The trend, however, is moving away from halogen, not towards it. CFL and LED lighting are fast replacing halogen lighting in both homes and autos. Check out the headlights on the Lexus LS 600hl. Just a matter of time...
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