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Old 01-02-2009, 02:32 AM   #1
oldpunk78
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hid?


this might be a dumb question, but i'm gonna ask anyway.

could you use an automotive hid bulb to light an aquarium. i don't know how may of you have noticed, but those things are wicked bright, and you can get them in in just about any K temp you want. you could mount it like a mini MH pendant. all you'd have to get is a 12v source, ballast, and some sort of reflector...

let the debunking begin...
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Old 01-02-2009, 03:38 AM   #2
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You can use just about any light source you can think of for an aquarium. Whether or not you get the results you are after, that is the question.
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Old 01-02-2009, 04:53 AM   #3
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I googled this and the thing that stands out it that they are very expensive! So, just as you can make a good light with LED's, there is no doubt in my mind that you can also make a good light with HID lights. But, in both cases you would be spending a lot more money than a T5 light of comparable intensity would cost.
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Old 01-02-2009, 05:22 AM   #4
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i'm just saying, that with a little work and about 150 bucks you could have about 5000 lumens(spell?) with just one 55w bulb. too much?
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Old 01-02-2009, 06:18 AM   #5
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I'd bet that the main issue would be heat - much like the halogen fixtures.....
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Old 01-02-2009, 07:00 AM   #6
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I wonder about the life of the bulb. Aquarium bulbs are on every day for 8+ hours, car headlights for most people are occasionally on. And if they're an expensive bulb, it might not be economical to replace it frequently.

But experimentation is how great discoveries are made.
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Old 01-02-2009, 03:09 PM   #7
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xenon gas hid bulbs are designed to last the life time of the car in most cases. there is no fillament(sp?) just a pocket of gas inside the bulb. they do tend to move up in the K range after a few years though. most are rated at 3000 hours.

as far as the heat issue goes, imagine a bulb smaller than a regular headlight bulb suspended over your tank. you can also get a pair of 35w bulbs/ballasts (around 3000 lumins each) for around $100 bucks. even if you had to replace the the bulbs once a year thats only like $45 year for bulbs. how much is one new hqi bulb and how long does it last?

i have no idea here - how much light (lumins) do you get from one 150w hqi setup? and how long does it last?
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Old 01-03-2009, 02:29 PM   #8
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I unfortunately don't have an answer to your questions, but there was an ad in on of the fish mags that had a HID lighting fixture. I'll have to look it up later today and get the URL for the site....
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Old 01-03-2009, 06:36 PM   #9
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Give it a try I say, would be interesting to know how it worked.
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Old 01-03-2009, 07:06 PM   #10
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i will need pressurized co2 first, lol (still saving...)

i was thinking if anything a really small pendant for a nano would be cool.
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Old 01-03-2009, 07:42 PM   #11
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Quote:
Originally Posted by hooha View Post
I'd bet that the main issue would be heat - much like the halogen fixtures.....
In an automotive environment, a 35w Xenon/HID lamp runs cooler than a 55w halogen.

If you're interested, I can get HID kits at $90 shipped. However, at that price, I'd rather find a 70-150w MH pendant or pick up a T5 fixture.
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Old 01-03-2009, 08:15 PM   #12
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These jsut came out and are using HID lighting:

http://www.thatpetplace.com/pet/group/5950/product.web

Saw them in the catalogue.

Craig
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Old 01-03-2009, 09:16 PM   #13
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Quote:
Originally Posted by t0p_sh0tta View Post
In an automotive environment, a 35w Xenon/HID lamp runs cooler than a 55w halogen.

If you're interested, I can get HID kits at $90 shipped. However, at that price, I'd rather find a 70-150w MH pendant or pick up a T5 fixture.
remember that you are getting 2 bulbs and 2 ballasts for 90 bucks. how much does a MH fixture cost? (i haven't looked yet. it's on my to do list...)
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Old 01-03-2009, 09:37 PM   #14
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Quote:
Originally Posted by Craigthor View Post
These jsut came out and are using HID lighting:

http://www.thatpetplace.com/pet/group/5950/product.web

Saw them in the catalogue.

Craig

yup, that's the one's in the magazine ad as well.

www.aquaticlife.com
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Old 01-03-2009, 09:37 PM   #15
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I'm aware of the cost differential, but when it's all said and done, it's easier and likely cheaper to just pick up a MH (I'm referring to pendants).

The balasts in automotive applications can get very hot. All do not handle moisture well. They draw LOTS of current during warmup (can reach >20A in some cases). My main concern would be finding a suitable reflector. That's a lot of light coming from a very small bulb. Getting it to diffuse over the area of a tank would be another issue.
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