Logo Lites now sells bright white LED Headlights for Model T, A, and early B Fords. They are as bright as a modern halogen, but pull less current than the 32/50 CP bulb. They focus like the original bulb and fit in the original type socket.
There is a video here:
https://youtu.be/FA_9u2kWMNk
More info and details here:
http://www.logolites.com/products/led-headlights/
-Kyle