It doesn't take much to stump me, but here it is anyway. Installed a standard 2-bulb (T8 - 32W) fluorescent light fixture (Home Depot) in the garage. Wiring was there hanging from the ceiling, but the previous owner hadn't installed one in that spot (only 2 of the 6 spots have fixtures). Checked for power at the wires, it's there. Installed light fixture (white to white, black to black (both done with marettes) ground to green screw. Light does not turn on. Swapped out the bulbs with another brand new pair off the shelf. Still no go. Bought another fixture to see if it is maybe a faulty fixture....that fixture doesn't work either... it's unlikely that I could buy two dud fixtures from different stores. Current is showing when switched on, but bulbs not lighting up. What am I missing? I have spent way too much time on this one light fixture. Help!!!!!