Measuring the surface temperature of a filament bulb with a thermocouple is ineffective using contact methods due to the low thermal mass of the filament. Contact with the sensor will cause the filament to equalize its temperature with the probe, leading to inaccurate readings. For accurate measurements, non-contact methods such as infrared thermometers are recommended. Repeated questions on the same topic should be avoided to maintain clarity in discussions. Understanding the limitations of contact temperature measurement is crucial for accurate results.