Sunlight through tubes to light tanks?

[PNA]

Anyone ever seen anything like this to light up tanks?
http://www.dayliteco.com/

Any idea on the equivalent Wattage?  Fairly large initial cost.. but after that, free light.

[BigDaddy]

Given that it will be in the ceiling... at least 9 feet above your tank... I'd guesstimate not very practical.  Putting the tank in front of a south facing window would probably have better (and cheaper) results.

Now... having never seen one installed, I can't say for sure....

[PNA]

It doesn't have to be flush in the ceiling... it could extend to the top of the tank.

[Ron]

Mike Paletta's book, Ultiimate Marine Aquariums, details a very successful set-up using this technology.  Come summertime, also a heck of a lot cooler than metal halides... No reason it wouldn't work equally well for FW planted tanks.