i just inherited a house and would like to update the kitchen lights. current lighting is fluorescent tubes on left and right walls 4 4ft tubes down each wall and and dual 2ft tubes over island counter. Left, right and center each have a switch. House built in the 70's. Lights are concealed in 6in space above cabinets where you only see lights if you look straight up.

|...()...| <-- decorative whatever ya call it
|.. /\.. |
|.. /|\...
|... \----- light tube (arrow goes over and up, () is the light)
|<-- wall

what would be best for lighting. bright light, low power use, and would fit in the space? or should i just update to newer fluorescent tubes?