There are brighter bulbs you can get for the stock holders.
http://store.candlepower.com/pamalidolitr.html
Mini wedge base upgrade bulb stage 1The Stanley® P3652 bulb produces 75 lumens from 5 watts of electricity. Provides brighter and whiter light in applications originally calling for any of the following bulbs:
European W5W, W3W, 2821, 2825 American 194, 168
P3652$4.20
Mini wedge base upgrade bulb - stage 2This Osram MiniXen® 2886X mini wedge (W2.1×9.5d) base bulb has an ultra long life, and produces 85 lumens from 6 watts for the brightest and whitest possible light (up to 80% brighter!) in applications calling for these standard bulbs:
European W5W, W3W, 2821, 2825 American 194, 168 Japanese 3652
Availability: Usually ships the same business day.
2886X$4.20
Mini bayonet base upgrade bulb - stage 2This Osram MiniXen® 3886X mini bayonet (BA9s) base bulb has an ultra long life, and produces 85 lumens from 6 watts. That's up to 80% more light compared to the following standard bulbs:
European T4W or 3893
American 57, 57X, 1891, 1893, 1895