In my 'travels' I have found:

Flourecents suck big time. hate them. the 'strobing' and the 'hazy' light they put out.

2x 100w bulbs in the overhead fixture (with shade removed), complemented with the 'desk type' (on the arm, positionable, as stated above), and mouted on the the corner of the table) really help. I've drilled a 1/2" hole on each corner so I can move it around for the best postion. I have another 'spare' if I need two!

Paint your room white! any other colour absorbs the light, and refelcts 'that colour'

Put your building table in the middle of the room, under the light fixture. that minimizes the shadows, and allows pu-lenty of light for what you're doing.

Bonus #2 to this, is that you have a table you can work around. "Lay out the plans, and build both wing halves at once" You don't have a wall to bump into, and you don't have to 'reach over'. It's also great when you're in the final building stages of the plane, as you can have it assembled on the bench, and not worry about it falling off. (or, as I have mine now, have the 'short end' egainst a wall, so it sticks out.)