My shop has 16 8' fluorescent t12s overhead at 12'. I have one 8' fluorescent t12 wall-mounted in the wash bay at about 6'. also, in the washbay, I have two 500 watt wall mounted halogens, to illuminate the rear and side of the vehicle.
I have two wall mounted 4' T8s (4100K) and two wall mounted 500 watt halogens.
In addition, I have two mobile carts, each with a 4' T8 (5100K - they rule!) and a 500 watt halogen.
A tripod mounted 500 watt halogen rounds out the lighting - not counting the 4 handhelds, for interior work.
The lighting is flexible and adequate.
Next time, I'll use Metal Halide lamps as the primary source, with as much T8 (5100K) as I can justify for 'daylight' color perception.
The halogens are imperative for swirl detection. They need to be portable/as flexible as possible. Angle of view is eveything!
The front wall of my shop is 90% glass.
Daylight is good. So good, that I'll consider skylights next time.
Hope this brightens up your day!
Jim