I have two sets of 4ft flourescent lights. One set hangs over my work bench at the back of the garage and the other hangs about in the center of the garage. It is usually adequate, but I also have a coupld of those portable HID lights that I can light up a specific work area with if needed. Speeking of garage lights, I also recently installed a new security light in front of the garage and that thing lights up the entire block it seems. It also has a setting where you can have it stay illuminated, but at a low intensity, until 3 (or 6 or 24) hours after sunset. In other words, it comes on at a low level after sunset and stays on for 3 or 6 or 24 hours (you set the time) even of no motion is detected. Then, after the set time it will go out unless motion is detected. One of the settings causes it to stay on at low level (about 1/2 power) until sunrise the next morning.
Basil