What is a common indicator that a paint booth filter needs replacement?

A common indicator that a paint booth filter needs replacement is reduced airflow or a noticeable odor of solvents. When a filter becomes clogged or saturated, it cannot effectively capture particles and pollutants from the air, which leads to diminished airflow within the booth. This reduction in airflow can negatively impact the paint application process, resulting in issues such as uneven application or defects in the finish.

Additionally, a noticeable odor of solvents can indicate that the filter is not adequately trapping volatile organic compounds (VOCs) or other harmful substances present in paint vapors. If these odors are evident, it suggests that the filter is no longer functioning effectively and may require replacement to maintain a safe and efficient working environment.

The other options do not directly relate to the condition of the filters. Bright colors in paint do not indicate filter performance, as they are influenced by paint quality and compatibility. Increased temperature in the booth could be a result of other factors such as equipment settings or environmental conditions. Poor lighting in the booth is related to lighting fixtures rather than filter condition. Therefore, the presence of reduced airflow and solvent odors specifically points to the need for filter replacement, making this the correct choice.