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-   -   hid? (http://www.plantedtank.net/forums/showthread.php?t=79468)

oldpunk78 01-02-2009 03:32 AM

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...

fshfanatic 01-02-2009 04:38 AM

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.

Hoppy 01-02-2009 05:53 AM

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.

oldpunk78 01-02-2009 06:22 AM

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?

hooha 01-02-2009 07:18 AM

I'd bet that the main issue would be heat - much like the halogen fixtures.....

spinycheek 01-02-2009 08:00 AM

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.

oldpunk78 01-02-2009 04:09 PM

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?

hooha 01-03-2009 03:29 PM

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....

spinycheek 01-03-2009 07:36 PM

Give it a try I say, would be interesting to know how it worked.

oldpunk78 01-03-2009 08:06 PM

i will need pressurized co2 first, lol (still saving...)

i was thinking if anything a really small pendant for a nano would be cool.

t0p_sh0tta 01-03-2009 08:42 PM

Quote:

Originally Posted by hooha (Post 754448)
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.

Craigthor 01-03-2009 09:15 PM

These jsut came out and are using HID lighting:

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

Saw them in the catalogue.

Craig

oldpunk78 01-03-2009 10:16 PM

Quote:

Originally Posted by t0p_sh0tta (Post 755438)
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...)

hooha 01-03-2009 10:37 PM

Quote:

Originally Posted by Craigthor (Post 755452)
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

t0p_sh0tta 01-03-2009 10:37 PM

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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