Quote:
Originally Posted by StirCrazy
I have seen the PAR numbers for the new LEDs at the bottom of a tank with water in it and to tell you the truth I wasn't impressed, it was no where near what I have measured on a 150 watt HQI MH, but I don't know if this was the way the guy measure it or what. it was weird as everyone tells me that with this set up you get the same output as (insert whatever) so I think what I am going to do is order a couple LEDs and do some direct comparasons from exact same distances as I am suspecting there is some distance fudging going on 
Steve |
Sounds like a good plan. I'll be curious to see what PAR numbers you get. Try to use some of the better LEDs like the Cree XR-E. Don't bother with the MC-E as it is not an optimal option for aquarium lighting. Also, try to run an array of something like 4 x 4 or 4 x5 LEDs with 50% cool white and 50% royal blue. You'll want more than 1 LED as in real world applications you will get overlapping output from the LEDs.
Or if you make it out to the Lower Mainland you could bring your PAR meter by once I've built my array and make some measurements.