...what to you know...???...that is what I am trying to determine...
...had you made a a shill but that seems to have been a mistake...
...it seems tall trees makes the spectrum king for super grow...the whole infrastructure of these things is a confusing tangle, eh...
...what is the problem with epistar...???...
....Mr Marnes was very open aboot the use of bridgelux and epistar LEDS in the spectrum king panels...
Check out all my grows over the years if you need proof that I know what I am talking about...many in my sig. Shills don't recommend the two most directly competing lights/companies. I do test panels for apache...after I bought 14 at120's 4 years ago. The reason why I still run them so loyally is because they are the best in theory and reality...many other companies(even more expensive than AT's) have offered me panels(and not loans...to keep)...but no one else has shown me even just on theory/on paper that they are better than what I have...so that is why I stick with my AT's.
I personally hate the A51's owner...he is a pompous ass...but his product is still solid and quality. So despite my personal felling...I still recommend it because it is the right/best recommendation for most. they are the closest thing to an apache...and are more affordable.
Cree's(a51) and nichia's(apache) are right off the bat more efficient and have higher output than any of the top available offerings from epistar or bridglux...even their best bins. In this point in LED tech it still takes the best(efficiency and output) to compete with hps while using less wattage. And that is why it is so important to get an led that has the specs that will provide the perforce you want.
You came on here asking questions...we gave answers...all answers that are backed with info and facts...but you were/are set in your decision before you even asked a thing on this site and have been very opposed to anything we say.
....as for micromole readings, it is the veracity of the reaings readings called into question...
...if the reading are not taken from the same machine but the same operator in a direct comparison, are they truly comparable...???...
Even with different meters, yes they are. Even the most budget of par meters is accurate for all intents and purposes of comparison...specially on white based panels. We are talking realistically 5-7% error with cheap meters...not enough to disregard the readings. Photons...measured in µmols...are the most important and correlated thing to growth. Light is light(quantity wise). Spectrum plays a smaller role than most think.