Aquatic Plant Forum banner
81 - 90 of 90 Posts

·
Registered
Joined
·
3,136 Posts
PLL is a biax bulb aka Power Compact or Compact Fluorescent.
Typically used with Philips made bulbs as part of the model ID.

They can be approx the same diameter as a T5 but are not considered high output as in T5HO.
 

·
Registered
Joined
·
655 Posts
beginner >>>>I need help i have anubias and java fern in a 85 gal. tank what type of wattage would anyone suggest that i use?
In my last planted tank I was using 120 Watts T-12 lights, 80 Watts of GE 6,500K and 40 Watts of GE Chroma on a 75 gallon tank. This was with a CO2 system that was not extremely efficient. At the time I had 3 different strains of anubias in that tank but they were partially shaded by many Amazon Sword plants in that tank. The lights were sitting on top of an Acrylic top that I had constructed.
 

·
Registered
Joined
·
655 Posts





- John N.


Sorry but I think these lighting levels are extremely high for planted tanks especially when your looking at the larger tanks. I have had 8 54 T-5's on a 120 Gallon reef where I was keeping some of the highest light demanding corals around. With a good fixture and a the lights low this gives more than 200 PAR at the substrate.

But yes a chart like this could create a rough guide for the beginner or even the intermediate individual looking at setting up a new tank. However the chard needs to produce a rang of low light, medium light and high light to cover the range of light used by different plants. Also it would be good to add a column for the old T-12 Florescent as they are still used by many as well as marketed in fixtures of up to 4 tubes. And last but not least LED lighting that I believe will make most of the florescent lighting obsolete in a few years.

There is only one big problem with setting ranges on LED's and that is the difference between LED's out there. You can purchase a LED that gives less then 75 lumns per watt or one that gives over 120 lumns per watt today with the same K rating. The industry is also claiming they will be exceeding the 200 lumns per watt range in less than a year.
 

·
Registered
Joined
·
20 Posts
Hi Everyone,

I'm looking to upgrade my lighting situation for my 20 gallon tall pressurized co2 tank. I've been saving the bucks to do it. If I understand the graph up there in this thread I should purchase a fixture with two T5HO bulbs that are 24 watts. Does that mean 24 watts total or for each bulb?

Can anyone tell me which fixtures and bulbs they've purchased for their 20 gallon and the positives and negatives about them? I'd prefer to have the new fixture sit on top of the tank....just an FYI. But will definitely consider light hanging above the tank, if that's a best solution.

Helpful Info:

20 Gallon Tall
Ph 7.4
Ammonia 0
Nitrates 10
Nitrites 0
Pressurized Co2, 2-3 bps, and 1hour daily siesta
Eco-complete substrate
Modified HOB filtration system ( adding one more of same)
Fully planted and thriving although a bit yellow and elongated from too low light.
Root Tabs paired with swords (Just ordered Flourish Tabs instead)
Leaf Zone Fertilizer in water column
 

·
Banned
Joined
·
732 Posts
Can anyone tell me which fixtures and bulbs they've purchased for their 20 gallon and the positives and negatives about them? I'd prefer to have the new fixture sit on top of the tank....just an FYI. But will definitely consider light hanging above the tank, if that's a best solution.
You are wasting time and money buying anything less than a LED fixture.
The good news:
OK I have one of these "just sitting" on a 20 gal reef tank and it puts out more than 400 PAR at the substrate. Since it is dimmable I run it at 40% with a diffuser that reduces the light down to 65 PAR.
http://www.amazon.com/TaoTronics-TT-AL09-Dimmable-Aquarium-Lights/dp/B0092LXQRM

The bad news:
They are out of stock.
There are a lot of similar fixtures but I cannot recommend any.
 

·
Registered
Joined
·
655 Posts
You are wasting time and money buying anything less than a LED fixture.
The good news:
OK I have one of these "just sitting" on a 20 gal reef tank and it puts out more than 400 PAR at the substrate. Since it is dimmable I run it at 40% with a diffuser that reduces the light down to 65 PAR.
http://www.amazon.com/TaoTronics-TT-AL09-Dimmable-Aquarium-Lights/dp/B0092LXQRM

The bad news:
They are out of stock.
There are a lot of similar fixtures but I cannot recommend any.
That fixture is 165 Watts. I can see where you have it at 40% power for roughly 66 watts of power. But even at 66 watts of power if it really is using efficient LED's it would be on the bright side for anything under 60 Gallons.
 

·
Banned
Joined
·
732 Posts
That fixture is 165 Watts. I can see where you have it at 40% power for roughly 66 watts of power. But even at 66 watts of power if it really is using efficient LED's it would be on the bright side for anything under 60 Gallons.
Seriously! Maybe you didn't read the part where I said it was at a "measured" 65 PAR in a 20 gal tank!
Now if that is too bright for you, what can you do?
1. Set it down to 20% (increase your already super long life)
2. Raise the fixture up 6 - 12 inches.
3. Add a second diffuser.
This is on a fixture that I purchased for $120. (BTW I have three).

Now if your fixture doesn't produce enough light, what can you do.
1. Buy another one and use two (or more).
2. Get a better fixture.
 

·
Registered
Joined
·
30 Posts
Hello, I am starting a Walstad method tank, no CO2. It is 7.5 g 40x26x30. Will 2 CFL 11W 6500 be ok according to wpg? A pet shop owner told methat it's going to be too much and I'll get algae for sure. What do you think?
 

·
Super Moderator
Joined
·
5,862 Posts
Annak, this sticky thread is very old and most of the information is outdated. That said, I still use a few CFLs over my Walstad tanks until they burn out. From my experience, I suggest just one 11W CFL over your tank, but keep the possibility of adding another one later.
 

·
Registered
Joined
·
30 Posts
Michael thanks a lot for your reply! I wasn't sure about wpg and thought that maybe for this area one wouldn't be enough so I ordered two CFLs. I'll start with one and see how it goes!
 
81 - 90 of 90 Posts
Top