The concentrated light travels down a pipe, which looks much like a traditional office light.

As you require a more concentrated light source for reading, you could experiment with compact fluorescent reflector bulbs, which use a mirror effect to concentrate the light.

Traditional fluorescent lamps generally do not produce enough concentrated light to be a primary light source for most indoor growing operations.

He then refined his techniques so as to be able to impose a controlled image of concentrated light on landscapes, then on people.

They are able to trap the werewolf in the concentrated light of the full moon collected by the diamond.