The typical 80 CRI (useful value or not) seem to be a glued fact to almost any LED I've measured.
The spectral curve that Andrew shares is exacly the same I get for both cheapos as well as "better brand" LED's. At the moment I'm on my way to check a Ferei divinglamp (to be combined with a GoPro cam) which holds 3 LEDS (the extremely powerful Cree XLamp XM-L2 LED). The diving lamp has three settings and the most powerful setting deliver about 2900 lumen! Un piccolo bastardo di luce! Madonna! You can get a nice suntan even underwater.
Italian or Finish site, make you choice
http://www.fratellicordi.it/1/w163_7401102.htmlhttp://www.valostore.fi/tuote/sukelluslamppu_ferei_w163/(Some people build divinglamps based on Soluxbulbes, but 50 W on a 12 V battery…not surprised that the LED is a real gift nowdays)
Ferei's own spectral information for the LED mentioned, show almost exacly the same spectralcurve that Andrew posted.
http://www.cree.com/led-components-and-modules/products/xlamp/discrete-directional/xlamp-xml2It has been a lot of talk about that little LED, which can be bought for 8 USD each for making your own stuff if you know how to deal with it:
http://www.ledgroupbuy.com/cree-xm-l2-white/http://www.ledgroupbuy.com/exotic-leds/Some people use this LED and combine it with other singlecolors LED's to maximize spectral enviroment for reef /aquariums. These guys measure spectras like maniacs to tune light in for corals and all the rest for an optimium environment. You see, geeky crazy people everywhere. Who cares about a shitty aquarium? I don't get it. But I don't mind the info though!
http://reefbuilders.com/2012/12/11/xml2-crees-highest-performing-led/http://playsofrays.blogspot.in/2012/12/leds-made-easy.htmlhttp://reefbuilders.com/2014/01/30/giesemann-futura-s/I doubt that spectral distribution would be different with any of the Photo panels. The choice of CCT seem to be the only option. Anyone measured any of the photopanels in regards of spectra? Another question – or more of a wish – …. if it's possible to convert a Solux to a LED….. shoulden't be impossible, no?
Off topic: does anyone know what part of the spectral distribution that gets lost under water and which is enhanced? I'm talking Maldive's water now. Perhaps a dip in the cyan part of the spectracurve (of a LED lamp) would be a good thing in that water nightdiving? I'm not sure how far from the lightsource the "filtering" from the water sets in on the spectral distribution of any light. Would be nice to know. Anyone at the Maldives here at this board? (Ah… so you've got better things to do there – I don't blame you)
Mi