Bulb question - Aquarium Advice

BlazerFRS · 10-31-2005, 01:36 AM

Hello,

I see around here the reccomended light kelvin rating is 6700 or so, but I"m wondering how big a difference this makes, as I have some [acronym:fd7cd76755="Compact Flourescent"]CF[/acronym:fd7cd76755] tues laying around I'd like to use but they have a kelvin rating of only 4100... how much of a difference does this make?

[acronym:fd7cd76755="Thanks in Advance"]TIA[/acronym:fd7cd76755]

Hoovercat · 10-31-2005, 08:43 AM

They should work as I've used a 2700k HPS bulb to grow aquatics before most people just find lower [acronym:d75ee7232b="Kelvin or Potassium, depending on context"]k[/acronym:d75ee7232b] numbers to be unpleasingly yellow.

malkore · 10-31-2005, 10:14 AM

All Kelvin is, is a measurement of the color of the output on a special black background. Kelvin is not very indicative of the spectral output.

Pretty much anything from 3000k to 10,000K has adequate red and blue spectral peaks for plant growth.

4100k is going to be very yellow, very much like an incandescent bulb. However, neon tetra look great under this lighting.

BlazerFRS · 10-31-2005, 05:10 PM

Thanks for the advice, I'll have to try them out and see what I think

CompMage · 10-31-2005, 05:58 PM

Yes, I have a 4000k light on a small 10 gallon. I got the light at lows, and my plants look just fine. I think they make the 5 little gold barbs I have in there look kinda nice. And the amazon sword is nice and healthy looking.

10-31-2005, 01:36 AM	#1
BlazerFRS Aquarium Advice Freak Join Date: Aug 2005 Location: Rochester, NY Posts: 320 Images: 4	Bulb question Hello, I see around here the reccomended light kelvin rating is 6700 or so, but I"m wondering how big a difference this makes, as I have some [acronym:fd7cd76755="Compact Flourescent"]CF[/acronym:fd7cd76755] tues laying around I'd like to use but they have a kelvin rating of only 4100... how much of a difference does this make? [acronym:fd7cd76755="Thanks in Advance"]TIA[/acronym:fd7cd76755] __________________ 10 gallon 2.6 [acronym="Watts Per Gallon"]WPG[/acronym], [acronym="Carbon dioxide"]CO2[/acronym] supplemented. 3 Dwarf Puffers, 3 Ghost Shrimp, 3 Otos Planted with Java Fern, C. retrospiralis, Java moss, chistmas moss, L. repens, R. rotundifolia, Wisteria, C. wendtii, C. lucen, S. subulata, M. heterophyllum, C. carolina

10-31-2005, 10:14 AM	#3
malkore Aquarium Advice Addict Join Date: Dec 2003 Location: Nebraska, USA Posts: 6,540	All Kelvin is, is a measurement of the color of the output on a special black background. Kelvin is not very indicative of the spectral output. Pretty much anything from 3000k to 10,000K has adequate red and blue spectral peaks for plant growth. 4100k is going to be very yellow, very much like an incandescent bulb. However, neon tetra look great under this lighting. __________________ Visit my aquarium pages - see specs on my tanks, and photos of how they've evolved My other passion: TheNinja 500R - updated 9/18/05

10-31-2005, 05:10 PM	#4
BlazerFRS Aquarium Advice Freak Join Date: Aug 2005 Location: Rochester, NY Posts: 320 Images: 4	Thanks for the advice, I'll have to try them out and see what I think __________________ 10 gallon 2.6 [acronym="Watts Per Gallon"]WPG[/acronym], [acronym="Carbon dioxide"]CO2[/acronym] supplemented. 3 Dwarf Puffers, 3 Ghost Shrimp, 3 Otos Planted with Java Fern, C. retrospiralis, Java moss, chistmas moss, L. repens, R. rotundifolia, Wisteria, C. wendtii, C. lucen, S. subulata, M. heterophyllum, C. carolina

10-31-2005, 05:58 PM	#5
CompMage Aquarium Advice Freak Join Date: Sep 2005 Location: Columbia, Maryland Posts: 260	Yes, I have a 4000k light on a small 10 gallon. I got the light at lows, and my plants look just fine. I think they make the 5 little gold barbs I have in there look kinda nice. And the amazon sword is nice and healthy looking. __________________ Always remember Men's Rule #1 1 Fish 2 Fish Red Fish Blue Fish

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10-31-2005, 08:43 AM	#2
Hoovercat Aquarium Advice Freak Join Date: Apr 2005 Location: Memphis,Tn US Posts: 438	They should work as I've used a 2700k HPS bulb to grow aquatics before most people just find lower [acronym:d75ee7232b="Kelvin or Potassium, depending on context"]k[/acronym:d75ee7232b] numbers to be unpleasingly yellow.

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