Ok, time for my impressions and and some PAR numbers. First off let me say that these fixtures are more substantial than I expected. They have some weight to them. I am going to compare these to the AI Hydra 26HD since that is a light I have used and am familiar with.
The Nicrew 100W fixture is a bit larger than the Hydras and weighs about the same. The LED clusters are not as tight, but sit under a large lens that seems to blend the colors quite well. There is very little color separation on my sand with these.
The included light stand is simple to assemble and seems sturdy enough. It is better suited for rimless, as it required some modification of my tanks trim AND the nuts on the light bracket. Once the modifications were complete, the lights were east to get on the tank and running.
The color produced is nice, though they do not appear to have as much of the deeper (royal) blue as I would like. None the less, the color is nice and crisp. The control out of the box is lacking with only 6 steps of intensity for each white and blue channel. While the lights can be used in this manner, it may be a limiting factor for some. With the use of 0-10V control, the color and intensity options are MUCH improved. When Using the spectral controller, "color" is actually controlling the intensity of the white channel and "intensity" is controlling the blue channel. I was able to set up a schedule with sunrise/sunset, ramping, clouds, etc. pretty easily, once I understood how to use the controller.
Overall, I am happy with the lights so far, quality seems better than expected, and they definitely provide plenty of PAR for anything I may choose to keep in my tank.
Now for the number. All measurements were taken with the stands in their highest position which puts them about 14" above my water line. All pumps were on, so the measurements are averages of changing values. The tank is a 40B (36"x 18"x16").