Ah.. see, thats what I missed. So If I am reading you correctly, they are on as long as the unit is plugged in to the wall, and then you can switch the individual flourescents on/off w/ provided switches. Only problem I can see with that is using it with timers. But as long as the case is easily openable, May be interesting to see if the tubes and LED's can be separated to different circuits.
As far as LED looks are concerned, there is a growing base of fans on plantedtank.net who seems to like to DIY them rather than looking at the expensive ready made options. Cree LED's, I know, are available in increments from appx. 3200 kelvin to 10k kelvin. Granted, it is a *somewhat* 1 shot deal on getting it right. Been also seeing a number of threads with people using a mix of LED's on different circuits and then using an Arduino controller to mix to their liking, and also replicating sunrise/sunset. I also definitely like the fact that un-lensed, linear LED's give you a nice ripple effect, akin to what i hear MH lights give you and you cant get from flourescents diffuse light.
But I digress from the thread topic...
Easy, the manufacturer calls them moonlights and just like that they are. And while the moonlights/LEDs are on all the time, if the fluorescents are switched off (at night) they're all that's left on.
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The only potentially better option that I'm aware of are 100% LED fixtures that use very little energy, although they're still pricey and I haven't heard good reports on their utility for growing plants. Also skeptical about the immutable type of light a straight LED array emits as opposed to the modifiable 6700K/10,000K configuration in a regular T5 fixture. Am guessing that we're many years away from a 100% LED array that can throw light that's comparable spectrally and aesthetically to a 6700k/Colormax or Gro-light combination.
