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Topic Review (Newest First)
09-02-2012 06:32 AM
Dugsul808
Quote:
Originally Posted by Kai808 View Post
Hey, I usually get the GE Daylight 6500K from Walmart for $6-8???. What kind of substrate are you using? I had DHG in my 10g first planted tank. It was sitting in an open garage with just ambient sunlight. It took about 3 months to carpet.
I just get some ge day lights at Walmart for 5$. And I'm using ada substrate
09-01-2012 10:53 AM
Kai808 Hey, I usually get the GE Daylight 6500K from Walmart for $6-8???. What kind of substrate are you using? I had DHG in my 10g first planted tank. It was sitting in an open garage with just ambient sunlight. It took about 3 months to carpet.
08-31-2012 04:43 PM
Dugsul808
Quote:
Originally Posted by kamikazi View Post
Sylvania makes 13 watt CFLs that are 6500K. I use their bulbs.

A 14 watt 6500K CFL should work great.
I seen some 13watt 6500k bulbs at long but they were 17$ for 1. So I'm trying to look for something cheaper
08-31-2012 04:42 PM
Dugsul808
Quote:
Originally Posted by Darreiamss View Post
i will certainely recommend 14 watt CFL LIGHT as no doubt it will last longer and will also consume less electricity than that philips bulb. and it will not heat up too much as the bulb gets heated as it makes water too much hot
I'm using the 14 watt right now. Got some result seeking more runners but sprouting slowly
08-31-2012 08:33 AM
Darreiamss i will certainely recommend 14 watt CFL LIGHT as no doubt it will last longer and will also consume less electricity than that philips bulb. and it will not heat up too much as the bulb gets heated as it makes water too much hot
08-30-2012 11:15 PM
BDoss1985 I use 2 6500k cfl bulbs made by Sylvania in my bedroom 10g planted tank and they work great. Forgot to mention they are small so they're in a normal 10g hood.
08-30-2012 09:32 PM
Hoppy
Quote:
Originally Posted by Dugsul808 View Post
How do you calculate the par?
I don't know of any way to calculate the PAR, but I may try to figure out a way to do it starting with lumens. I haven't tried that yet. You can buy a lux meter from Amazon or Ebay for around $15 plus shipping, and use that to measure the light intensity in lux at the same distance as your bulb will be from the substrate, with the light sitting across a couple of chairs. Divide the lux reading by 61 and you are very close to the PAR at that distance.

EDIT: No you can't calculate PAR. If you had a point source of light, mounted at exactly the focal point of a perfect and huge parabolic reflector, you could calculate the PAR. But, we never have either a point source of light nor a perfect parabolic reflector. The problem is that so much of the light is not directed to the aquarium substrate, and the light that is directed to the substrate isn't evenly distributed over a known area. No matter how much data you get you are always short of data to calculate the PAR or lux at all accurately. We are stuck with having to measure it if we want an accurate number.
08-30-2012 05:50 PM
kamikazi sorry, double post...
08-30-2012 05:50 PM
kamikazi Sylvania makes 13 watt CFLs that are 6500K. I use their bulbs.

A 14 watt 6500K CFL should work great.
08-30-2012 04:44 PM
Dugsul808
Quote:
Originally Posted by Hoppy View Post
That 14 watt CFL bulb should be about 20 inches above the substrate to get 40 micromols of PAR, which is as much light as you need, with CO2 to grow the carpet. Any closer to the substrate and you will very likely have to fight off algae attacks.
What about a 14 watt 6500k same brand bulb?
And I'm trying to grow it with the dry start method though
08-30-2012 03:04 PM
acitydweller Hoppy knows his math
08-30-2012 01:06 PM
Sethjohnson30
Quote:
Originally Posted by Dugsul808 View Post
How do you calculate the par?
You buy a par meter. Or just ask hoppy. He is the lighting god.


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08-30-2012 08:31 AM
Dugsul808
Quote:
Originally Posted by Hoppy View Post
That 14 watt CFL bulb should be about 20 inches above the substrate to get 40 micromols of PAR, which is as much light as you need, with CO2 to grow the carpet. Any closer to the substrate and you will very likely have to fight off algae attacks.
How do you calculate the par?
08-29-2012 06:24 PM
Hoppy That 14 watt CFL bulb should be about 20 inches above the substrate to get 40 micromols of PAR, which is as much light as you need, with CO2 to grow the carpet. Any closer to the substrate and you will very likely have to fight off algae attacks.
08-29-2012 07:25 AM
Dugsul808
Quote:
Originally Posted by aweeby View Post
When you submerse, i'd say at least 5-6" above the surface. For DSM, experiment. if the top of the tank is hot to the touch during photoperiod peak, then raise it some more. depends on the type of bulb you have, ambient temp in the room, length of photoperiod, toughness of the plants, etc.
Okay man thanks for the help
Btw where did you say the links were?
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