- Which bulbs are tuned on/off from the two on/off switches on the six tube T5 flixtures?
- Is it a problem if water or water vapor gets on the top side of the T5 fixture?
One switch operates the two center lamps (3,4) and the other switch operates the four outside lamps (1,2,5,6).
There should not be a problem. The ballasts are sealed and the lamps are protected from condensation from above.