Ok, my understanding is that there are basically 2 main colored LEDs available, blue around 450, from which white is created by adding filters, and red around 620, which other shades of red are created from by adding filters. So if you can make a white cob from blues in a bunch of different variations, why cant they make a red cob similarly, using the red LED's? Maybe Im way off base on this.
For example go to the BML custom site and drag a 3500k white onto the bar, youll see its listed as 25% efficient and it peaks at about 620nm, because of the filters used to create the white light at this desired spectrum. These are created using 450ish nm blues which are originally in the high 30% efficiency range, and they still retain some of the initial spike at this color range. If you drag a 615 red onto the bar, youll see that its 44% efficient. So to create a broad spectrum in the red range, couldnt they just create a cob using this very efficient red, with some filters applied to create a broader spectrum range cob, which would be more desirable AND more efficient in the process, while easier to use than individual stars and significantly more efficient than going with a extremely filtered white, like a 2700k, to get a good boost in that nm range? Maybe Im tripping but this seems feasible in my warped sense of reality. Less heat, more output, better spectrum seems like a win, win, win...
http://www.bmlcustom.com/custom-led-strip/
