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Deba
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 Posted: Sat Jan 24, 2009 7:55 pm Post subject: What wattage of CFL Lamp for good plant growth. |
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Dear All,
I am planning for a 18L X 18H X 12D tank with full of plants. I will use substrate and liquid fertilizer with CO2 from pressurised cylinder. But kindly suggest the wattage of CFL lamp required for good plant growth, and for how long will I have to keep them on.
Thanks.
Deba. |
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harshal
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| Posted: Sat Jan 24, 2009 9:18 pm Post subject: Re: What wattage of CFL Lamp for good plant growth. |
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hi deba
Why do you want to use CFL? try out a PLL instead. You get it in 36W/18W it needs an external ballast. This will be a far better option to use then a CFL, plants will certainly do better with PLLs. |
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Deba
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| Posted: Sun Jan 25, 2009 8:05 am Post subject: Re: What wattage of CFL Lamp for good plant growth. |
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| CFL is also available at 36 watt. I think both CFL and PLL gives the same light one is without the built in ballast and the other has the ballast in it. |
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natureaquariumlover
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Deba
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| Posted: Sun Jan 25, 2009 7:29 pm Post subject: Re: What wattage of CFL Lamp for good plant growth. |
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| thanks a lot for the above link.......In Kolkata I have seen blue colored CFL Lamps being sold in the market will they do any help for the plants ?? |
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natureaquariumlover
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| Posted: Sun Jan 25, 2009 8:42 pm Post subject: Re: What wattage of CFL Lamp for good plant growth. |
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| Blue coloured CFL doesnot mean Blue spectrum always. Go for Osram PLLs. There are a few 5000 K and 6500 K models. Look into the spectrum range, there should be good amount of red and blue |
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Deba
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| Posted: Mon Jan 26, 2009 8:05 am Post subject: Re: What wattage of CFL Lamp for good plant growth. |
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thanks  |
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tigermath
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| Posted: Fri Apr 17, 2009 2:37 pm Post subject: Re: What wattage of CFL Lamp for good plant growth. |
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What the problem with cfl guys? Thay r doing just as well as pll as I've seen in my friends houses.
I'm having a 36wt pll, but now will add this with a 14wt cfl..anybody can explain why pll is better than cfl. I'll use 6500K cfl. So what's the problem. |
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Tirtha C
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| Posted: Fri Apr 17, 2009 3:13 pm Post subject: Re: What wattage of CFL Lamp for good plant growth. |
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| Avik..... if the height of the tank is more than a feet, Enough lights of CFL will not reach to the bottom. But PLL is having better penetration power than CFL. |
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tigermath
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| Posted: Sat Apr 18, 2009 6:46 pm Post subject: Re: What wattage of CFL Lamp for good plant growth. |
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penetration power I can calculate from lumin na?
Please explain how can I know which lamp is better,a more lumin lamp or a low lumin lamp. In particular, how can I understand which lamp has more penitration power?
There r osram,philips and many other(atleast 4-5other)brand's pll r readily available at kolkata, how to chose from them. |
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Tirtha C
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| Posted: Sat Apr 18, 2009 6:51 pm Post subject: Re: What wattage of CFL Lamp for good plant growth. |
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| tigermath wrote (View Post):
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penetration power I can calculate from lumin na?
Please explain how can I know which lamp is better,a more lumin lamp or a low lumin lamp. In particular, how can I understand which lamp has more penitration power?
There r osram,philips and many other(atleast 4-5other)brand's pll r readily available at kolkata, how to chose from them.
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You can't say hich one has more penetration power without proper instruments. So surf the net to know the exact technical analysis of CFL and PLL.
You can pick up any good brand 6500K PLL. |
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joyban
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| Posted: Sat Apr 18, 2009 7:23 pm Post subject: Re: What wattage of CFL Lamp for good plant growth. |
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Hi Avik...
There are two types of CFL (Compact Fluorescent Lamp)
Integrated CFLs
Integrated lamps combine a tube, an electronic ballast and either an Edison screw or bayonet fitting in a single CFL unit.
Non-integrated CFLs
Non-integrated CFLs have a separate, replaceable bulb and a permanently installed ballast. These ballasts are typically of the magnetic type, and the starter is housed in the base of the replaceable bulb. Since the ballasts are placed in the light fixture they are larger and last longer, compared to the integrated ones.
Non-integrated CFL housings are more expensive and sophisticated.
A typical CFL is in the range of 17 to 21% efficient at converting electric power to radiant power, the luminous efficacy of CFL sources is typically 60 to 72 lumens per watt.
So you can use any type of CFL Intregrated or Non-Intregrated
For which will have more penetration power and which will be good for plants you have to see the Colour Spectrum, Lumens, Radiant Power of the Lamp - CFL Intregrated or Non-Intregrated. So to say which one is better cannot be justified with out the lighting parameters in question.
PLL is term initially used by Philips for the NON Intregrated CFL, PL = Philips Lamp , L = L Long Fluorescent Lamps so PL-L = Philips PL-L, Philips Long Fluorescent Lamps which is nothing but a Non intregrated CFL. Now because the PL-L is longer than length, that way they can cover a longer length of the aquarium and has thus an advantage.
Regards
Sujoy
NB :- Also you could read this post as well :-
http://indianaquariumhobbyist.com/community/modules.php?name=Forums&file=viewtopic&p=136545#136545 |
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tigermath
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| Posted: Sat Apr 18, 2009 10:47 pm Post subject: Re: What wattage of CFL Lamp for good plant growth. |
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R u my known Sujoyda? 
Anyway, I understand the technical part, but kindly put some more light on integrated cfl, should I take one with higher lumen,higher kelvin rating? That's all. If a non integrated and an integrated CFL have the same parameters, or in case the integrated cfl has more ratings for everything..should not it better?
And I have 36wt pll in my 16g tank, now I want to add some more light on the back side for the red plants(I'll put some soon).
Suggestions. |
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Rana
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| Posted: Sun Apr 19, 2009 11:28 am Post subject: Re: What wattage of CFL Lamp for good plant growth. |
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Deba
PLLs are also CFL lamps, CFL is a general terminology to represent these type of triphosphore high intensity efficients lamps.
PLL stands for PHASED LOCKED LOOP which utilises an external electronic ballast only for current frequency control. It utilises 4 pins in holder.
There are other technologies also CCFL (Cold Cathod Flurocent Lamp) , PLC (Programmed Logic Control), etc.
However it does not matter what bulbs are you using; essentially all are triphosphor flurocent lamps and can produce your desired result depending on spectrum and intensity.
A lamp will appear more bright aka more lumen if its spectrum covers a large amount of its light distribution in green range. But plants donot utilise the light frequency in green range, so lumen is important for brightness and appreance for the aquarium but not relevant to plant growth requirement. Human eyes respond more to the green spectrum, hence normal commercial bulbs aredesigned accordingly
Plants tubes like OSRAM Floura emits its light spectrum in red and blue zone with very little spread in green, so they appear very dim and pinkish. But plants can grow very well under these types of lamps. So just do not go for higher lumen ratings only
I suggest you, choose full spectrum bulbs like OSRAM 954 PLLs or Biolux FL.
Hope this will help you to choose your bulbs.
Regards
Rana |
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harshal
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| Posted: Sun Apr 19, 2009 11:44 am Post subject: Re: What wattage of CFL Lamp for good plant growth. |
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Hi
To add a few more details to what has already been mentioned an integrated CFL was made to replace incandescent bulbs, the wattage ratios one sees on the box is compared to a bulb not a tube light. also With intergrated CFLs these were not made to run in moisture laiden enviorments, they will detoriate quickly over short time spans as moisture does get into the ballast electronics.
The general Lm/watt ratio for an integrated CFL is arround 50 - 60 and that of a pll is arround 65-75 lm/watt.
Hope this helps!! |
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