The cheapest solution would be a normal 'worklight' socket and a
PAR 75 or 150W quartz halogen lamp. (Home Depot etc.)
That will give you the bright, aimable, 'whiter' light you're looking for.
Those lamps operate at a higher than normal temperature so don't
leave it on for more than a few minutes at a time.
There are also CFL (compact screw in fluorescents),
available in higher, (bluer), color temperatures.
Look for 3000 and above on the labels.
('Fill in' with incandescents for best color balance.)