Nice build, the author tool a PC heatsink, some trim (I have lots of small pieces of leftover trim), a laptop battery to make a portable large light. Author uses it as a “light bomb”. I look at it as a portable super bright light. One thing pointed out was you may want a CPU fan on the thing too to help cool it.
http://www.instructables.com/id/DIY-Led-Light-Bomb-Using-Old-Laptop-Battery/