my new cold cathode lamp

i have made a change from white led's to a white cold cathode light. i have got a small cold cathode light that has its own 6v ballast. this light is alot brighter and since the anode and cathode dont get hot, it lasts alot longer then a hot cathode lamp. i have tested the light and it works without any problems. unfortunatly, when i use it with my transistor circuit, the light will not ignite as there is insufficant power going into the ballast. this is not good as i cant use the origional circuit that ran the led's. the problem is with the transistors as there is too much currant being pulled. i need another circuit that has the same features as the origional circuit yet it can run the ballast. this is a problem.