I have two ceiling lights on the same circuit in my bathroom. After 30 minutes of being on both lights go off. If I do nothing one light will come back on after a random interval of time. If after going off and I turn the lights off at the switch the lights will work again after waiting 30 minutes. Any help?

Sounds like these lights have a thermal overload switch that is kicking in. If the fixture gets too hot it automatically turns itself off, so as to avoid becoming a fire hazard. Are these ceiling lights the recessed can type? Many (maybe all?) recessed ceiling fixtures have this feature. If these are in a ceiling that has insulation (such as in a ceiling directly below the attic), perhaps the insulation is stuffed too tightly around the recessed can, causing the heat build up.

Another reason is exceeding the maximum wattage lamp that the fixture will accommodate.

Thank you. These are can lights in the ceiling below the attic. I will check the insulation around the light.

Thanks. Bulbs are 60 watt and hopefully not overloading.

It's not amps, but the heat generated from the lamps. Look for a max wattage on the fixture. Try substituting 40 W lamps temporarily. I agree with the ventilation/isulation as well.

Many times it is the type of bulb and not the wattage of a lamp that causes this heat.

Example, a recess fixture that is rated for an 100 watt R- Reflector lamp, has a standard 60 watt A lamp in it. The reflector lamp is designed not only to push out the light but heat also, and the fixture can handle 100 watts. But us a standard A lamp, which is your typical household incandescent lamp, does not have the benefit of the reflector.

The lower amount of heat from a 60 watt lamp becomes entrapped in the fixture that wants a reflector lamp, and causes the thermal cutout to trip.

So, along with checking if any insulation is covering the fixture, be sure to use the proper lamp in the fixture.