What causes of CFL failure?

Compact fluorescent lamps (CFLs) can fail due to several factors, including overheating, which can damage the electronic components inside, and frequent on-off cycling that stresses the lamp's circuitry. Manufacturing defects, such as poor quality control in the production of the lamp or its components, can also lead to premature failure. Additionally, power surges or fluctuations in voltage can negatively impact their lifespan. Finally, the degradation of the phosphor coating over time reduces light output and can lead to total failure.