I don't really like the idea of the submersible one...if you had to choose between the Orbit Pro or the SB Reef, which would you pick?
BTW, not to say you have to like them, but submersible is neat for a few reasons:
- reduces load on your heaters – might even be enough to eliminate the load while the lights are on
- lights can be hidden behind the rim of the tank
- eliminates waste-light getting into your room
- makes LED's run cooler, which should extend their life vs similar LED's run in air and might even help them to run a little brighter (The 8850 is specifically engineered to take advantage of this cooling effect.)
- eliminates reflection of light off the water surface, which is at least a 10% bonus to intensity
- eliminates light loss due to the usual air-gap that's in between the water and light
- just cutting this distance in half will double the light going into your water....imagine cutting it to zero.
- this can be a huge bonus to intensity vs the same amount of light run in air even just a few inches over the tank.
I think it's a worthy option!