Sahin Posted June 12, 2013 Share Posted June 12, 2013 Which will give more visible pop, the 405nm true violet or 430nm hyperviolet? I suspect it is the 430nm, but I am not sure. Have you tested both by shining each over a few corals to see the fluorescent effect? I am looking to add about 6 of either to my T5 setup. I realise I wont see much if any pop from the violet LED's whilst the T5's are on, but at least with the T5's off, I expect to be dazzled by the coral fluorescence. Link to comment
MeepNand Posted June 12, 2013 Share Posted June 12, 2013 Well, violets are pretty dim. They will fluoresce your corals though. Link to comment
Sahin Posted June 12, 2013 Author Share Posted June 12, 2013 Well, violets are pretty dim. They will fluoresce your corals though. Yeah, I'm not sure which of those two go for, hence the thread. Hopefully Milad will let me know. Link to comment
jedimasterben Posted June 12, 2013 Share Posted June 12, 2013 430nm emit more light and are getting closer to a wavelength we can see correctly - however, both still appear the same overall brightness in my testing of each, as our eyes still can't see those wavelengths properly. 430nm pack more of a punch, they are absolute monsters when it comes to PAR. Slap several of them on a heatsink with tight optics and you've got yourself a cannon. And you won't see any of the visible effects, unfortunately, if any other lights are on. Link to comment
Captain Ron Posted June 13, 2013 Share Posted June 13, 2013 430nm emit more light and are getting closer to a wavelength we can see correctly - however, both still appear the same overall brightness in my testing of each, as our eyes still can't see those wavelengths properly. 430nm pack more of a punch, they are absolute monsters when it comes to PAR. Slap several of them on a heatsink with tight optics and you've got yourself a cannon. And you won't see any of the visible effects, unfortunately, if any other lights are on. So if you were choosing between 420nm and 430nm, which would you get? I understand 420nm is a photosynthetic peak, and as you mention, 430nm is a little easier to see. Would you pick just 430nm, or half of each? Link to comment
Horerczy Posted June 13, 2013 Share Posted June 13, 2013 So if you were choosing between 420nm and 430nm, which would you get? I understand 420nm is a photosynthetic peak, and as you mention, 430nm is a little easier to see. Would you pick just 430nm, or half of each? Based on previous posts Ben has made that I've read he would go with 430 seeing as that's Milad's violet led wavelength and Milad has what are probably the highest quality easily accessible violets on the market. 430nm violets touch on the 420nm wavelength anyways it's just not their peak wavelength. Link to comment
jedimasterben Posted June 13, 2013 Share Posted June 13, 2013 The photosynthetic peak is at 428nm. http://www.nano-reef.com/topic/313663-lighting-spectra-photosynthesis-and-you-new-plots/ Link to comment
Chris155hp Posted June 16, 2014 Share Posted June 16, 2014 430nm emit more light and are getting closer to a wavelength we can see correctly - however, both still appear the same overall brightness in my testing of each, as our eyes still can't see those wavelengths properly. 430nm pack more of a punch, they are absolute monsters when it comes to PAR. Slap several of them on a heatsink with tight optics and you've got yourself a cannon. And you won't see any of the visible effects, unfortunately, if any other lights are on. do the 430 hold up well? i have heard that "uv" leds have a tendency to burn out Link to comment
jedimasterben Posted June 16, 2014 Share Posted June 16, 2014 do the 430 hold up well? i have heard that "uv" leds have a tendency to burn out As long as they are kept cool and the lens is made from silicone and not PMMA plastic they will last at least 20K hours for most, and for the bigger brands such as SemiLEDs they should be 30-40K hours. Link to comment
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