Air cooling your light

Just wondering what different duct/inline fans people use to cool their HID's.

If you could post the name, size, price, and a brief summary it would be most helpful.

Thanks growers <3

humm I sense a lot of heat issues in here

http://www.hydrofarm.com/pb_detail.php?itemid=8092

There's a link to the fan I use, I got it at my local hydro shop. It moves a lot of air and it has a 5 year warranty