I thought I would post some of the Photosynthetically Active Radiation (PAR) numbers in my tank. I used the clubs PAR meter that is made by Apogee, Model MQ-200. Apogee states there is around a 10% to 11% error when using there PAR meter under LEDs. The reason for this error is that the sensors and meter are less sensitive to the blue wavelengths and thus read low under blue LEDs. Here is a link to that info. http://www.apogeeinstruments.com/light-intensity-measurements-for-light-emitting-diodes-leds/ PAR readings were taken directly above the coral where you see the number. The pictures were take when my Hydra 52 and Vega's where at there programmed max at 12:30pm and I run this max output for 3.5 to 4 hours a day.
