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#1
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![]() Looking at getting a 24" fixture for my frag tank. Anyone out there have one looking at getting user reviews on quality and how corals are reacting.
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360 gallon sps reef, 180 gal sump, bubble king supermarine 300, 4xmp40Wes, 2 x 6215 tunze waveboxes, 4 ghl mitras 360 Reef Tank |
#2
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![]() i am hoping to pick my 5' next week-i'll be playing around with my par meter and i'll see about posting the readings
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#3
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![]() I know that J&L had to raise their Illumina that they placed over their frag tank by a few inches and decrease the LEDs output to ~60% when they replaced the Halide unit that was there beforehand. Apparently it was to much light for some of the corals.
without optics on the LEDs, the spread of light is significantly more uniform. |
#4
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![]() Sorry, have to disagree with that statement. With all the LEDs down the center output will be less uniform. You will have higher PAR directly below the LEDs and it will drop off front to back. Just because the primary optics have 120 degree spread does not actually mean that the output from an emitter is the same across the whole 120 degrees. There is a drop off in output off center from the emitter.
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#5
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![]() http://www.canreef.com/vbulletin/sho...t=66180&page=4
Below is the non scientific Vertex Illumina SR 1200-200 PAR measurement taken with a Apogee Quantum Meter. My tank is 18" tall and the fixture is 6" above the surface. White 100% - Blue 100% - Royal Blue 100% 759 about 5mm below the surface 484 On left frag rack 392 At top right coral colony 242 Center of Red Monti 227 Center of Clam 185 Front Elegance Coral 214 Bottom right middel of tank 148 Bottom rear of tank |
#6
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![]() Quote:
Quote:
http://reefbuilders.com/2010/01/27/l...ics-explained/ I'll quote the important bit of it: "But just because an LED is rated at 120 degrees, it doesn’t mean you get the lighting punch of the LED across the entire spectrum. Just like any other point of light source, it’s going to be stronger the closer you travel to the center. Along the central axis the LED emits 100 percent of its relative luminous intensity and will lose intensity the farther you move away from the central axis. For simplicity’s sake, if a 100 lumen will produce 100 lumens of light at the center and a measurement taken 25 degrees from its central axis, the output of the LED will appear to drop to only 80 lumens. Continuing on the path away from the center axis a measurement taken 45 degrees off axis will yield only 40 lumens, and so on, until at 60 degrees, only 10 lumens or so are emitted." Also, to add secondary optics they would have to completely redesign the fixture as the emitters would have to be spread out over the entire face of the fixture rather then clustered or you just compound the problem and you would have even higher intensity down the middle and even more drop off front to back. Simply adding secondary optics to this design is not the solution, it would compound the problem. I guess I just don't see it as a "smart" design. It could have used fewer LEDs, reducing the cost, being more energy efficient and likely had higher performance to boot. It also has nothing to do with Mercedes vs. Kia. I am sure it is a well built unit and it does have some nice features but performance wise I can't justify the price. Would you buy a Mercedes that drove and performed no better then a Kia? I know I wouldn't. I would want a better feel, better acceleration, handling, ride, reliability, build quality etc. to justify the price premium. Quote:
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#7
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![]() Quote:
![]() I'm a fan of the Illumina's other benefits like Easy expandability, control elements, smart design. Given the modularity of the LED pads, who says you won't be able to add optics if thats what you believe in? It's just nice to see a smart design with an eye on the future. as far as the price ... you don't get a Mercedes for the same price as a Kia |
#8
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![]() Quote:
on a 60" tank 48" work? How many LED's what type pf optic's Color how many blues how many whites what type of transformer? what wire.
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180 starfire front, LPS, millipora Doesn't matter how much you have been reading until you take the plunge. You don't know as much as you think. |