01 Mar 2014
Posted by Cliff 
When looking at getting LED lighting for your aquarium, it can seam overwhelming when considering all the features and options that you will have to choose from. However, it doesn’t have to be all that difficult if you keep it simple. I have learned that applying a few simple concepts, or rules of thumb, LED lighting become a whole lot easier to understand. The below is what I have learned. This is not and all inclusive set of instructions, just something simple to get you started if you have no experience with LED lighting. Most people do not pay attention to the angle of the lenses used or do not understand how different the wattage can be with a LED diode (as compared to a T5 or T8 bulb) and they end up with a fixture that really will not meet their long term needs.
I have included some simple guidelines for both fresh water and marine environments so you may also have a few other points of comparison.
- For tanks that are 36 to 48 inches long and 12 to 24 inches tall, I would suggest a fixture that is about 6 to 8 inches wide (or even a little wider) – For a 48 inch long fixture you should have around 30 to 40 1 watt LEDs, either Cree or Apollo manufactured LED diodes.
- For a 36 inched tank, about 25 to 30 1 LED just as mentioned. This would give you the options for easy to keep and some of the moderately depending plants.
- Get a fixture with about 20% more LEDs if you think (or are planning) that want more demanding plants in the future or corals for a marine set-up.
- If you are putting this fixture on a freshwater set-up, then choose LEDs with a color temp of less than 7,000K. -If you are putting this fixture on a marine tank, then choose LEDs with a color temp of higher than 12,000K, 18,000 to 20,000K is best.
- For a fresh water set-up you can add a few red or Fugi pink colored LEDs if you want to help the colors in your tank “pop”
- For a marine set-up you can add a few Fugi pink or actinic LEDs you want to help the colors in your tank “pop”. You can also have a 50/50 mixture of 12,000 to 18,000K white and 22,000K or higher blue LEDs and still support coral growth (most corals) while helping to limit algae.
- Add a controller to adjust the intensity of the light if you want. Many different manufactures make the LED controllers differently with a lot of different options. You should research this carefully so you know what you can and cannot control.
- For lenses, I would suggest a mixture of about 50% of the lenses around 40 to 60 degrees, the rest around 60 to 80 degrees. This will determine how much light intensity will be reaching the bottom of the tank and is just as important, if not more important, than the wattage of the LEDs themselves. The below simple diagram (not to scale) can help you better understand what I am talking about
I hope you have found this information useful You can also read through the below link for some additional information on reef aquarium lighting http://www.reefaquarium.com/2012/reef-lighting-2/
The below link also contains a lot very information as well
http://www.advancedaquarist.com/blog/2013/2/aafeature
2 Comments
Hello! I have had a 55 gallon reef set up for 10yrs. Very Basic Set Up. for the past 3-4 yrs or more, I had let it go. I’m now getting it back up and running. I need to replace my T12 110W Italian VHO Lighting (w/2 lights, 220W’s). I have about 75lbs of live rock, some polyp coral, fish and inverts. I would like have soft and hard corals, anemones, and a clam or 2. I do not want to spend a lot of money. I am looking at T5 HO or LED. Here are 2 items i’m looking at on ebay….
item 161238446088 48″ LED •64x 3W LED (48x 10000K daylight, 16x 460nm Actinic)
item 380547188976 48″ T5 HO
•T5 HO 54W x4.
•Dual Lunar module x4. ( 2 LEDs in each module)
2x 54W 10000K daylight bulbs, 2x 54W True Actinic bulbs, 4x Dual lunar LEDs
I’m thinking these are well below anythign you woudl consider, but probably an upgrade to the T12 110′s I currently have.
Can you make a recommendation? Or point me in another direction? Around $200-250 in the most I want to spend at this time.
Both lighting options should do just fine on a standard 55 gallon tank if you want to keep anemones and SPS corals, however, I would recommend the T5 as a better option of the two options that you have listed in your post.
That LED lighting in your link is a little too low of a color spectrum for my liking. I would recommend a fixture with more blue emitters and white ones that have a higher color specturn.
The T5 would work a little better if you were to up-grade the white bulbs from 12,0000 to 14,000 or 18,000K and replace one of the actinic bulbs with a super blue bulb with 20,000 to 22,000K. But you would not need to do that until the current bulbs are ready for replacement. Once replaced, your lighting would be a lot better