Standard incandescent and halogen bulbs should work with any dimming light circuit. Standard LEDs will not. Dimmable LEDs can be unpredictable with older dimmer switches because of the different circuitry. A specific LED-ready dimmer switch is a much better solution. CFLs (compact fluorescents) also need to be the dimmable type. Note that smart LED dimmer bulbs should never be used with dimmer switches of either kind – they don’t work together.