Sunlight for the aquarium!

All the time that i've been in this aquarium hobby, its always a practice that we do not expose the tank to direct sunlight but today, i just stumbled upon a blog and this guy had something called Sun Tunnels and they're basically tubes all the way through the ceiling which directs sunlight into the aquarium. An aquarium illuminated by natural sunlight! Way cool! Check out Reef Rancher's on the reefers' blogs links on the right side