You can't beat the price
of those $6.99 500W halogen lights they link to, but they run very hot and are not going to be very comfortable (or totally safe) to work
with. I would suggest instead going with high output compact fluorescent bulbs such as these 250W equivalent (4600 lumens) ones - they will run much cooler and be much more comfortable to work
The rounded top type
will give more light in a forward direction, which is useful if you are going to use them without a reflector.
You could use these bulbs in a suitable desktop lamp
(with enough clearance for the bulb), a clamp-on worklight from a DIY store, or a light stand AC swivel adaptor like these (~ $20/pair shipped):http://search.ebay.com/search/search.dll?from=R40&_trksid=m37&satitle=AC+Swivel+Adapters