The Ray 2 is a very white light. I'm seeing excellent growth with it, just look at the UG example from above. It's also very bright, which I don't always love at night when I'm sitting next to it. I like it for the growth, but I'm thinking it'd be fun add a bit more color to it.
I'm in the middle of an arduino dosing pump project, and realized I have a controller, the power supply, and all the parts, and all I needed was a
light to play around (price jumped $1 since I bought it).
Below are some examples of what I'm messing with. In conjunction with the Ray 2, they add very noticeable color to the tank for the regular photo period. With red running at 100% and green at 20% and blue at %2, the character of the tank changes and feels warmer. I don't feel like this does it justice, but here is an animated gif swapping between the Ray 2 alone (the cooler image) and the Ray 2 with my RGB light (the warmer image). It's subtle, but really noticeable in the reds and on the wood in person.
Here are 4 images of examples that I plan on programming as part of their daily schedule. The RGB is not bright enough to drive any growth on it's own, so I can run these outside of the Ray 2 without any worries. I can run the RGB lights from 6 am to midnight if I want.
Late Red Sunset:
Sun has set, civil twilight:
I still have to figure out implementation and how to mount it to the Ray 2, plus write all of the code, plus wire up everything professionally, etc... so I have a bit of leg work yet. I can say that I am really happy this "proof of concept" so far.
At night with just these LED's it looks stunning. Very dimly lit, dark shadows, and mysteriously deep.
Seriously... $13, and I can schedule them and program them to do whatever I want.