What issue may some incandescent lamps experience when using electronic dimmers?

Some incandescent lamps can experience humming when used with electronic dimmers due to the way these dimmers operate. Electronic dimmers often use a method called phase-cut dimming, where the dimmer controls the amount of voltage reaching the bulb by cutting off part of the AC waveform. This process can create a low-frequency hum, which is especially noticeable in quiet environments.

The hum results from vibrations in the transformer or the internal circuits of the dimmer, which can be amplified by the light fixture or the bulb itself. Additionally, certain bulbs can be more prone to this phenomenon based on their construction and the materials used.

In contrast, other options may present issues with incandescent lamps, but they are less directly related to the operation of electronic dimmers. Flickering can occur if there are compatibility issues, color changes are not typically associated with incandescent lamps, and burnout can happen over time but is not specifically tied to the use of electronic dimmers as humming is. Thus, humming stands out as a common issue linked to the interaction between incandescent lamps and electronic dimmers.