See article on RAIS at  

http://www.ledsmagazine.com/features/6/5/8

R > 0.9 Power Factor from 1W upwards 

R > 90% Efficiency at 12v from mains in

R Dimmable on ALL domestic dimmers 

R Inherent constant current output 

R Small size, low cost, long life 

R Granted Patents 

R Opinion showing no 3rd party license fee   

Copyright 2009