Tslay29 January 4, 2012 January 4, 2012 Hey all I'm new to this forum so please be patient with me. I currently have a 120 gallon tank with the dimensions of 60"x18"x25" and I am using the T5HO lighting system with 4 54Watt bulbs totaling 216W for my tank. I am trying to convert my lighting over to LED lights with an output lighting high enough to maintain some nice corals in the tank. After looking around for some LED lights I found a site with these LED specs: http://i1142.photobu...ota29/lamps.png So my question is, would 2 of the 120W LED fixtures have all the necessary attributes(Lumens, Lux, and PAR) for a 120gallon reef/coral tank? Thank you.
trockafella January 4, 2012 January 4, 2012 I think a little more information on these units would be helpful. I know it has specs, but who makes it, what is the bulb configuration, etc..
Origami January 4, 2012 January 4, 2012 With 39 3-Watt LED's on each fixture, you're probably going to have plenty of light since they will easily replace (and maybe exceed) 250W MH in terms of PAR. Without experience with the fixture, though, you may want to explore if other reefers have changed the balance of Blue to White LED's for better color performance. The ratio for what you've posted is 17 Blue to 22 White (cool). If you like a bluer, 20K sort of look, you may consider increasing the number of Blue LEDs that are present at the expense of some of the white ones.
Guest thefishman65 January 4, 2012 January 4, 2012 Another thing to note is that they are using Epistar and Bridgelux LEDs. These brands (from what I have read) are fine for color and quality, but they are not as efficient as the Cree so you will pay more for electricity. Now that statement depends on the type of LEDs being compared, but generally is true. I would really like to see how the calculate the efficiency (93% ??). LEDs are just not that efficient and turning electricity into light.
Origami January 4, 2012 January 4, 2012 (I'm guessing that it's probably the efficiency of the driver.)
zygote2k January 5, 2012 January 5, 2012 I'm guessing that this is some overstated value designed to make the normally apprehensive about buying foreign crap from ebay person turn into the person who would actually buy this foreign crap. Some of these foreign fixtures have burst into flames or had meltdowns. Buy quality the first time.
Antony January 5, 2012 January 5, 2012 you may want to explore if other reefers have changed the balance of Blue to White LED's for better color performance. Increasing the number of Blue LEDs that are present at the expense of some of the white ones.
Coral Hind January 5, 2012 January 5, 2012 I think the two 120w fixtures would be a good light over the 120g tank. I'm guessing that this is some overstated value... I agree with the overstated efficiency values. I also think the life hours are being overstated in many of the LED fixtures being sold.
Guest thefishman65 January 5, 2012 January 5, 2012 I think you would be a little light with only 120 watts, but it depends on what you want to keep. LPS or SPS.
basser9 January 5, 2012 January 5, 2012 A high voltage driver like a thomas research driver is around 92 percent and a high end emmitter last so long while keeping its color that compared to other lights they seem to be to good to be real. THATS WHY EVERYBODY IN TEN YEARS WILL HAVE LEDS......THEY ROCK......
trockafella January 6, 2012 January 6, 2012 A high voltage driver like a thomas research driver is around 92 percent and a high end emmitter last so long while keeping its color that compared to other lights they seem to be to good to be real. THATS WHY EVERYBODY IN TEN YEARS WILL HAVE LEDS......THEY ROCK...... Bold statement. With the rate of change in technology, LEDs may not be the "best".
basser9 January 6, 2012 January 6, 2012 The radion is the first baby step towards what a fixture should be. They only needed to replace the center fan with a cluster of xml/420nm leds to make a perfect replacement for a 400 watt radium. Until the diy community starts building there fixtures with clusters and 3ups/4ups there will be alot of poor results from sps reefers. Its not the leds its the misinformation that is horrible as it pertains to them. For the most part any info on the web about ledscomes from t5 users as most sps reefers are happy with mh. My large electric bill and leds abillity to be dimmed has pushed me from my 20k mh lights which i love and they work great to playing around with led clusters.
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