An old fluorescent lamp or an aging bad ballast.
One lamp t12 ballast.
Ge 2 bulb commercial electronic fluorescent light ballast.
Worked for replacing 2 2 lamp t12 ballasts and going down to three t8 bulbs in the fixture much brighter than 4 t12 bulbs plus the energy savings with dropping atleast 32 watts with removing 1 bulb from the fixture.
Ge ultrastart proline electronic ballast 120 277 volt program rapid start ballast normal ballast factor ballast for fluorescent light 1 or 2 lamp t12 4 6 out of 5 stars 61 19 37 19.
Original ballast power fed from tombstones on one end of fixture single red and blue ballast connections connected to plunger end lamp holder read more.
So at different stages of the lamp s life different light levels will be produced.
So i bought 2 ge proline t12 ballast for 2 f96t12 this one had a black and white wire when in doubt read the wiring diagram on the ballast wiring diagrams ge survivor t12 ho fluorescent all weather sign ballasts figure 4 figure 5 figure 6 figure 7 figure 8 figure 9.
Fluorescent lamps almost always experience color variation and fading.
Touch the remaining probe to the ends of the blue red and yellow wires leading from the ballast.
Replacing ballast for f96 t12 2 single pin lamp fixtures.
But if you re seeing dark.
The common yellow wires are capped with small wire connectors.
Ge mvp t12 ballasts have the same wiring and mounting requirements as.
After 1 lamp rapid start ballast is replaced with a 2 lamp rapid start ballast the ballast blue wires connect to one end of the lamp the red wires connect to the other side.
Ge ultrastart proline electronic ballast 120 277 volt program rapid start ballast normal ballast factor ballast for fluorescent light 1 or 2 lamp t12 4 6 out of 5 stars 72 16 45.
The wiring of the ballast was different than the one it replaced but the included wiring diagrams make it easy to hook up.