Lighting questions
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Lighting questions

This is a discussion on Lighting questions within the Beginner Planted Aquarium forums, part of the Beginner Freshwater Aquarium category; --> Hey all, I just have a few questions maybe you guys can help me out with. I have a 15 gallon aquarium, flourite substrate ...

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Old 01-03-2011, 06:41 PM   #1
 
Lighting questions

Hey all,

I just have a few questions maybe you guys can help me out with.

I have a 15 gallon aquarium, flourite substrate and a DIY co2 system. My question concerning lights is, i have 2 T8 tube fixtures with Glo brand Life-Glo bulbs in them, they are 18'' each at 15 watts rated at 6700k, i believe. Will this setup enable me to grow medium-high light plants. I also have a spare light fixture that has 2 CFL bulbs in it rated at 15 watts a piece and 6500k, should i use one t8 configuration in combination with the CFL bulbs or should i go with the two T8 lights?

Sorry if this is a stupid question but, it seems like the extra wattage from the CFL bulbs, with a total of 30 watts, plus another 15 from a T8 tube would be better. I'm just really unsure of this stuff.

am i out of luck without having a T5 setup?

Thanks and sorry for rambling on
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Old 01-03-2011, 11:02 PM   #2
 
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lights

more lumens...hmmmm i like the compacts...can you do two 27 watts...i love putting two fixtures on for 108 watts...
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Old 01-04-2011, 10:03 AM   #3
 
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I think that with two 15w t8 bulbs at 6700K, you should be fine for everything except the most light demanding plants. 2 watts per gallon worked really well for me for quite a while on my 30 gallon tank. Remember to use a good liquid fertilizer, and "medium light" plants should do pretty well.

I also have CF bulbs on one of my smaller planted tanks, and am experiencing record breaking growth :P If you wanted even more wattage than you are getting from the t8s, I wouldn't see a problem with putting one or both of your CF bulbs over it also. Just be prepared for algae issues with that much light.

Last edited by DanMarion; 01-04-2011 at 10:05 AM..
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Old 01-04-2011, 10:11 AM   #4
 
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Quote:
Originally Posted by DanMarion View Post
I think that with two 15w t8 bulbs at 6700K, you should be fine for everything except the most light demanding plants. 2 watts per gallon worked really well for me for quite a while on my 30 gallon tank. Remember to use a good liquid fertilizer, and "medium light" plants should do pretty well.

I also have CF bulbs on one of my smaller planted tanks, and am experiencing record breaking growth :P If you wanted even more wattage than you are getting from the t8s, I wouldn't see a problem with putting one or both of your CF bulbs over it also. Just be prepared for algae issues with that much light.
+one for the T8 bulbs. Would try and start with as many plant's as possible. With large plant mass that is thriving,,you will have less issues with algae. Would also begin with eight hours of light and slowly increase to ten hours over weeks,months.
Worked well for me and other than diatoms when tank was first set up with plant's,I had no algae issues.
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Old 01-04-2011, 10:47 AM   #5
 
I would use the compacts over the T8s, but thats just me. I have a 15 gal set up similarly with 2x15 sprial compacts and often 1x15 watt T8. I don't run CO2 and don't have algae issue either. I'm getting my first Anubias flower in that tank along with a decent amount of pearling during the day.
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Old 01-04-2011, 11:20 AM   #6
 
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Originally Posted by Mikaila31 View Post
I would use the compacts over the T8s, but thats just me. I have a 15 gal set up similarly with 2x15 sprial compacts and often 1x15 watt T8. I don't run CO2 and don't have algae issue either. I'm getting my first Anubias flower in that tank along with a decent amount of pearling during the day.

Wow, nice. I've never seen a plant pearl (even in sunlight).
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Old 01-04-2011, 11:37 AM   #7
 
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Wow, nice. I've never seen a plant pearl (even in sunlight).
Really. I can get it in my high tech tanks when things are trimmed back and CO2 is tuned correctly. Been a long time since it could do that. Its much slower in a lower tech tank, but you certainly don't need high tech to make a plant pearl.
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Old 01-04-2011, 11:49 AM   #8
 
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My Anubias plants also pearl during the day. I get random pearling from the other plants, but its definitely the Anubias that does it the most.
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Old 01-04-2011, 01:46 PM   #9
 
Thanks for all the great responses! As always this forum is a great help.
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