I have high-end lights on my DT (4xT5 with 2xHydra26), but my spare frag tank has always had a pretty poor spare light. A friend of mine who used to run Black Box lights on his tank, bought this light on Amazon for $100 and reported that it was really good. I purchased it last week, and it's honestly pretty darn good looking on my frag tank. Really nice ability to control between blue and white to achieve a great looking result.
It is bluetooth, and with the app you can set 6 times of the day for a schedule. Each schedule slot you can program whatever intensity of blues or whites that you want (so you could use the first slot to turn them on at 25%, 2nd 50%, 3rd 75%, 4th 100%, 5th 50%, and 6th to off, for example)
The MAJOR problem is that if you turn off the switch manually, or if you lose power, then all the scheduled programming is totally lost and you have to re-set it all up. I never plan on manually turning off the switch, but I know that I have to remember to program it whenever the power goes out to my home.
It is really super thin, but it has a large footprint so I'm getting really great light all over the frag tank. For 100 bucks, I'd definitely recommend this thing.