What should users keep in mind regarding the TF-2 bulbs during long sessions of use?

Monitoring for heat buildup is crucial during long sessions of use with TF-2 bulbs because excessive heat can lead to decreased performance and even potential damage to both the bulbs and the device they're in. TF-2 bulbs, like many lighting components, are sensitive to prolonged exposure to high temperatures, which can cause issues such as flickering, decreased brightness, or a shortened lifespan. By keeping an eye on the temperature, users can ensure that the bulbs function optimally and maintain safety, preventing overheating that could lead to failure or safety hazards. This practice ultimately helps in prolonging the operational life of the bulbs and maintaining a consistent lighting experience.

The other options don’t address the immediate concern of heat, which is a critical factor in ensuring both safety and effective use of the bulbs during extended periods.