The first step is to figure out how much lighting is needed.
Assuming ~ 35 lumens per sq ft, a space that is 8' x 12' would require 35 * 8 * 12 = 3360 lumens.

If it is a rectangular shaped box using old T12 tubes, you could either upgrade the existing fixture to use T8 tubes with electronic ballasts.

If you have a circular shaped fixture that you intend to replace, T8 fluorescents are the cheapest option.

Or you could spring for a Cree CR series troffer which is dimmable but comes with a significantly higher upfront cost.

Here is a link that might be useful: Cree troffer

Thanks, davidtay. See kitchen, cabinets and lighting measurements below. Also, I didn't mention that the upper cabinets go all the way to the ceiling. No window; however, a doorway at each end of the galley. The current lighting fixturen is 48" long with 4 tubes.

Kitchen Measurements
14� 9" long
10� 1" wide
36" deep lower cabinets/counters on each wall
13" deep upper cabinets
40" walkway opening on one end
32" doorway on other end

So that evidently means I need 5250 lumens. Is that correct?

I did find a place fairly near me that sells the Cree line. Will check regarding cost.

I looked at the Home Depot and Lowes websites and the T8 tubes appear to be very expensive, as well as the electronic ballasts, but I may be looking at them incorrectly. This is all new to me.

About right.

The total amount can be divided up between under cabinet and the main fixture if you want.

T8 fluorescent lighting is pretty inexpensive especially when you get 2 - 4 tube fixtures.

Is dimming important? If so, dimmable electronic ballasts are relatively rare (i.e. - not available in either HD or Lowes) and expensive. In which case, the CR24 becomes competitive.

walnutcreek,

What are all of your reasons for replacing the existing fixture? Would a more attractive, instant-on no-hum fluorescent fixture do, or are you trying to improve the light distribution, or just get away from fluorescent?

My initial thought was to get rid of the fluourescent.