I bought all new 4 tube T8 light fixtures to replace the old 2 tube T12 fixtures. I kept the same number of fixtures as I had before so there's actually twice as much light and that is so nice since much of the time I spend out there is evenings after work. And now with shorter daylight hours here in the north east that extra lighting is nice. No shadows anywhere in the shop so I can see if I have a run in a finish while it is still wet, can read the tape measure and see fine lines better.DSCN3312.jpgDSCN3311.jpgDSCN3317.jpgDSCN3316.jpg