I'm hoping Dana will shed some light on that eventually, as it does seem like Kessil somehow does more with less. So far in my own testing, the Kessil growth is just as fast as my other LED(s) is for the same size frag, cut at the same time from the same coral.if the kessil is like the other kessils the par reader will not read it right and we all know that kessil is a very capable light