The fluorescent lights can't work normally outside with 75°F. maybe replace your ballasts can fix the issue. Some IC will protection the ballast if working temperature high. 75°F is low temperature.
Or replace the fluorescent lights with led light directly. LED fluorescent light is energy saving, 18w can replace 40w. no ballasts requirement. You can connect the led fluorescent light with 220v/110v directly.
For kitchen, if replace fluorescent lights with led light, please kindly care the CRI more than 85%. If lower CRI, you will find the food is not good to see.
Hope this can help you.