I installed 40w CFL's in my vac station fixtures on 3-29-2011. I haven't had one fail yet. They are enclosed fixtures out in the heat of the sun. I think Meps conversions were in the bays. That's why it doesn't make sense to me....I guess it could be the quality of the bulbs. I bought all mine at 1000bulbs.com.....I have a hard time believing the fixture would have anything to do with it. I can believe different wash locations may have voltage/wiring issues that are causing problems. I get a perfect 120v coming into my wash, maybe that has something to do with why mine are lasting so long.