My inexpensive CFL light solution - Page 12 - The Planted Tank Forum
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post #166 of 285 (permalink) Old 08-18-2012, 01:50 AM
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Hey, quick question:

Having two 23 watt lamps sitting directly on the plastic cover won't melt it, right?
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post #167 of 285 (permalink) Old 08-18-2012, 03:36 AM
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I just finished some testing of CFL bulbs in those reflectors. The bulbs get pretty hot, even with the open end of the reflector out in the open. I wouldn't try this with them sitting on the glass/plastic top, because that would restrict cooling air flow around the bulbs. Some CFL bulbs last a very short time when in a closed or almost closed fixture, others last their full life, but knowing which one you have is not that easy. A friend of mine says he knows where to get the ones that can tolerate the closed fixture, but he didn't tell me the "secret".

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post #168 of 285 (permalink) Old 08-18-2012, 03:56 AM
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Quote:
Originally Posted by Hoppy View Post
I just finished some testing of CFL bulbs in those reflectors. The bulbs get pretty hot, even with the open end of the reflector out in the open. I wouldn't try this with them sitting on the glass/plastic top, because that would restrict cooling air flow around the bulbs. Some CFL bulbs last a very short time when in a closed or almost closed fixture, others last their full life, but knowing which one you have is not that easy. A friend of mine says he knows where to get the ones that can tolerate the closed fixture, but he didn't tell me the "secret".
Hmm... the plastic is getting hot. One of my lights went out when I turned it on for the second time. I'm scared.
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post #169 of 285 (permalink) Old 08-18-2012, 07:02 AM
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thesetwo tanks were CFL dome lit and did VERY well
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post #170 of 285 (permalink) Old 09-01-2012, 04:33 PM Thread Starter
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Wow, algea beater, I love the tanks! They look great. I have had nothing but success with this lighting, I can't imagine spending more on lighting, there's no reason!
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post #171 of 285 (permalink) Old 09-03-2012, 04:01 PM
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Quote:
Originally Posted by Hoppy View Post
I just finished some testing of CFL bulbs in those reflectors. The bulbs get pretty hot, even with the open end of the reflector out in the open. I wouldn't try this with them sitting on the glass/plastic top, because that would restrict cooling air flow around the bulbs. Some CFL bulbs last a very short time when in a closed or almost closed fixture, others last their full life, but knowing which one you have is not that easy. A friend of mine says he knows where to get the ones that can tolerate the closed fixture, but he didn't tell me the "secret".
I bought couple 6" fixture with 23watt bulbs and they get super hot, I could smell burnt plastic in the room. So I drilled few extra ventilation holes right on the top of the fixture.
My tank is 40 tall so to deliver some par through 24 inches of water I probably should get two more lights like that.
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post #172 of 285 (permalink) Old 09-03-2012, 04:10 PM
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A single 40W CFL over my 10G grows HC well!


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post #173 of 285 (permalink) Old 09-11-2012, 02:48 AM
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Love this thread!

I am just setting up a 5.5 gallon tank. I have a 13 watt CFL in a variation of this lamp:
http://www.ty-downlight.com.tw/product/3237.html

Mine is black with white on the inside. How high should I have it off of the substrate? It is a dirted tank with no other dosing/co2. It is currently 15 inches from the bottom of the dome to the substrate. Too high?
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post #174 of 285 (permalink) Old 09-27-2012, 06:00 PM
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I use a zoomed dual dome reptile light, the sockets are ceramic and can handle the heat of 100W incandescent bulb.

They are 2-3x as expensive but has 2 bulb sockets.
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post #175 of 285 (permalink) Old 09-27-2012, 06:59 PM
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Quote:
Originally Posted by mach_six View Post
I use a zoomed dual dome reptile light, the sockets are ceramic and can handle the heat of 100W incandescent bulb.

They are 2-3x as expensive but has 2 bulb sockets.
Do you have pics of your setup? How big is your tank?
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post #176 of 285 (permalink) Old 09-27-2012, 10:47 PM
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Great thread here, I'm debating on purchasing FugeRay Ultra Slim LED or going with two 13w 8" clip on lights. I currently have Amazon Sword and Anubis on driftwood and adding... No CO2 but maybe down the road once I learn more. Just looking for input on this decision?
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post #177 of 285 (permalink) Old 09-28-2012, 04:36 AM
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We are putting four 13w CFls on our 55 gallon tank. Have two on it right now and they look great. Couldn't find 6700k so we got 6500k. The oter two will go in Saturday. I'll post some pics.

Oh yeah we have them sitting right on the glass we are ysing as a tank lif and it doesn't get hot at all or smell of burning.
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post #178 of 285 (permalink) Old 09-30-2012, 06:02 AM
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post #179 of 285 (permalink) Old 09-30-2012, 06:09 AM
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You can always get those reptile dome lights and just add a 23 watt CFL. They normally house heat halogen bulbs that are design to get hot. There is usually 3 - 4 small holes pre-drilled and I think the cost is about the same as Home Depot, Lowes etc.



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post #180 of 285 (permalink) Old 09-30-2012, 07:37 PM
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I am planning a 40g breeder low tech set-up. I love this method and love the look! My question would be if I am going for low-medium light how many of what watt bulb would I need? The tank dims are 36x18x17" tall, so I would imagine I would need at least 2 bulbs to get coverage.

Last edited by wetrelief; 09-30-2012 at 07:54 PM. Reason: update
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