Very interesting, let's discuss it some more.
I've been reading all the LED threads and have been very interested in the topic. It's so great that we're starting to see some of these finish up so we can get into the discussion of "value proposition"
I'll try to be very balanced with my comments, but please call me out if you think I'm missing something.
Let's talk about 126 LED = 400 HPS. In many of the threads the most I've heard anyone say one of these could do was 2 grams per watt. 126=400 would mean 3.2 grams per watt, (assuming a 400 HPS does 1g/w). This would be fantastic but I don't think you need to get that high of a ratio in order to make LEDs worth the purchase price.
Many of the experienced growers here use a 1 g/watt benchmark as the standard to hit (for HPS anyway). I think 1g/w is reasonable for LED when all the costs and benefits are considered but this is obviously and individual consideration.
In this instance we're at 0.87 grams per watt LED, which is pretty darn close. The HPS will clearly be over 1g/w when the last plant's weight is added (outstanding result)
The issue in my mind, is the start up cost vs. the savings (tangible and intangible).
Pro's =
stealthiness
lack of added heat
lowered energy cost
safety
long bulb life (5 years claimed)
Cons =
purchase cost
learning curve
I didn't list budability in my commentary because I looked at the pictures
This is enough to settle the issue in my mind whether you can flower, but I'd still love to hear comments about how tight and hard the nugs are and whether there's any difference in the effect, smell, etc.
So in my mind the issue is one of payback, not function, which is what I'd hoped for from the beginning, as a fan of technology.
Scooby spoke of maybe getting 50% better from experience, this would take one well over the 1g/w benchmark.
So, is the payback worth it?