Which is brighter? 56K alert! *****UPDATE>>>> 4 - The Planted Tank Forum
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post #1 of 24 (permalink) Old 11-26-2003, 07:08 AM Thread Starter
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From the pic below, two bulbs are the same level of brightness. The label says ALL-GLASS AQUARIUM 32 watts. The other one is a Philips "Natural Color" rated 32 watts and at 5000K. All bulbs are 48" T8s.

I have no clue which one is brighter. I have just finished rewiring the whole thing (many thanks to Sam-aka GCA), I am able to see a bluish tint from the AGA bulbs. The 5000K bulb looks too soft to me and does not appear as bright as the other two.

I will post a similar pic with the bulbs being OD later. It is midnight in Colorado as I type this...

Robert
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post #2 of 24 (permalink) Old 11-26-2003, 01:26 PM
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Those bulbs will grow plants but you might be happier if you go to Home Depot, or similar place, and pick up some daylight bulbs. When I was using shoplights I used the daylight bulbs and had to fight the plants off when I'd get near the tank.

Sean

Aquascape? I'm a crypt farmer.

It's a fine line between fishing and standing on the shore looking like an idiot.

That IS an aquascape, it's titled "The Vacant Lot".
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post #3 of 24 (permalink) Old 11-26-2003, 02:02 PM
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Well, at glance I would say the phillips looks brightest. As I study them it seems like they are all about the same. How much are those phillips bulbs? I would go down to the hardware store and pick up a couple more, if they are not too expensive, and then photograph the tank as a comparison. That might be a little more accurate.

--- Dave ---
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post #4 of 24 (permalink) Old 11-26-2003, 02:43 PM
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Hate to bring up PAR again, but even if the Phillips bulb looked brighter to our eye, it doesn't mean it is providing more light to the plants. Time will tell. Let the plants grow under one spectrum for a few weeks and then the other spectrum for a few weeks. All other things remaining constant, let plant growth be the judge.

My opinion is that those All-Glass bulbs are going to be the trick. They appear to be similar in spectral distribution to the GE Aqua-Ray 9325K bulbs that All-Glass uses in the F40T12 fixtures. Perhaps they sourced a F32T8 tube in a similar spectrum? Are there any markings on the AGA bulbs?

Can't wait to see the ODNO pics!

- Sam P -
plantedtanker in limbo - all tanks currently in storage
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post #5 of 24 (permalink) Old 11-26-2003, 03:35 PM Thread Starter
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Sean,
The Philips bulb is a "natural color" and the label says it simulates natural full-spectrum light.

Dave,
the Philips bulb was $6.97 + tx.

Sam,
I agree with you about what you say on the AGA bulbs. I have a couple of pics on the bulbs that I will post later.
I just don't know how to compare a bulb from one another by just looking at the brightess they give off. Since the AGA bulbs have a bluish tint, are these brighter when it comes to comparing their spectrum? I hope that makes sense. I think I will have to look at a spectrum chart to compare...

Look for pics later today.

Robert
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post #6 of 24 (permalink) Old 11-27-2003, 05:18 AM
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According to the Drs. Foster & Smith catalog, the GE Aqua-Ray 9325K are available in a few sizes of NO fluoro tubes as well as the "famous" 55w compact. It's possible those could be 36w GEs. I have a 55w & it's a bluish-white.

Those all seem to be the same general "brightness", but they're different colors, so hard to tell.
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post #7 of 24 (permalink) Old 11-27-2003, 05:45 AM Thread Starter
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More pics!
First pic is the Philips bulb from HD.
Second pic is what the bulbs say that came with the fixture.
Third pic is after rewiring. It is hard to tell b/c the pic is smaller.
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post #8 of 24 (permalink) Old 11-27-2003, 07:01 AM
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Don't place such an emphasis on brightness as Sam said, unless you're specifically looking for a brighter tank simply for aesthetic purposes. Scorpion, look for some type of alpha-numeric code on the lightbulb. I'm not familiar with the imprint as pictured at all.
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post #9 of 24 (permalink) Old 11-27-2003, 07:03 AM Thread Starter
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Alpha numeric? What does it mean on a bulb?

Robert
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post #10 of 24 (permalink) Old 11-28-2003, 07:06 AM
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For example, my 36" GE Aqua Rays Fresh & Saltwater bulbs have the self-explanatory code "F30WT8-AR-FS" imprinted on them. Anything like that.
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post #11 of 24 (permalink) Old 11-28-2003, 07:08 AM Thread Starter
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Nope! No code. WYSIWYG!

Robert
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post #12 of 24 (permalink) Old 11-28-2003, 07:57 AM
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Darn. Don't know what it is, then. Their colors certainly look similar, but mine's made in Great Britain.
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post #13 of 24 (permalink) Old 11-28-2003, 06:33 PM Thread Starter
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I have emailed AGA. When I get a reply, I'll let ya know.

Robert
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post #14 of 24 (permalink) Old 12-04-2003, 07:52 PM Thread Starter
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>>>>>UPDATE<<<<<

The following is a reply from AGA:


Robert,
The Kelvin is 9325 for all of our bulbs. The application for fish only would be leave it as is, for a planted tank you would change the two outside bulbs to a bulb with a 5000-6500 Kelvin rating. There are special plant bulbs on the market, you would probably get the best advice from your local pet store professional. The diameter of these bulbs is a T-8 and they are 32 watt bulbs.
Sincerely,
Charlene Scherer
All-Glass Aquarium Co.
414-421-9670
charlenes@all-glass.com


No wonder I did not see a difference when I installed that Philips 5000K bulb. AGAs bulb are 9325K!

Robert
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post #15 of 24 (permalink) Old 12-04-2003, 08:02 PM
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Quote:
Originally Posted by Scorpion
Robert,
The Kelvin is 9325 for all of our bulbs. The application for fish only would be leave it as is, for a planted tank you would change the two outside bulbs to a bulb with a 5000-6500 Kelvin rating.
So are they actually implying that the 9325 bulbs are not suitable for a planted tank, and should be exchanged with 5000-6500K bulbs? Don't they read this webboard? :lol:
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