Okay, let's take your point and use some math on it, rather than speculation.
again, neither I nor the author of the linked article said anything about whether or not coral will grow using these lights, they merely raised some valid questions concerning the quality of the components used, the actual efficiency of those components and whether or not they actually produce the light spectrums they claim.
True, the actual energy $$$ concerned are trivial, but the fact still remains concerning the efficiency of the individual components.
There is a reason they are a fraction of the cost of other units and it isn't solely because of where they are coming from.
that article called into question their longevity and the warranty.
How long have you guys been running them and how do they fair in regards to heat generation in comparison to others, as that was one of the main contentions of the article,
inefficient components=wasted electricity=heat=short life span.
what is your take on that point of the article.
As I don't currently have any LED lights, I am not emotionally invested in one over another, I'm just looking at the information provided and regardless of personal opinions, the numbers have to be considered.
personally, after research/shopping around, I'm leaning towards making my own unit as finances permit as being the most concise answer for me.