Two and a half years ago when I moved here I had 5 shop lights hung on the basement ceiling. The fluorescent bulbs (4 ft. long size 32) stopped working in one of the fixtures recently. The bulbs are not darkened but first one kept turning off, then stopped lighting entirely, then the second bulb did the same. This is in a room where it is only turned on a few times a week. Are all the other bulbs in the other fixtures going to go now? I wonder whether it is the inexpensive fixture that needs replacing or the fluorescent bulbs?