Which of the following is not an advantage of heat removal luminaires?

Heat removal luminaires are designed to manage the heat generated by the light source, ensuring that the lights operate more efficiently and with enhanced longevity. Increased energy efficiency is one of their primary advantages, as these luminaires can dissipate heat effectively, allowing the light source to function at optimal temperatures, which translates to lower energy consumption.

Better light distribution is another benefit of heat removal luminaires. By managing heat, these lighting fixtures can enhance the performance of the light source, leading to improved uniformity in light output across spaces.

Reduced glare is also an important benefit, as effective heat removal can help maintain the quality of light output, contributing to more comfortable lighting conditions. This is crucial in environments where visual comfort is necessary.

In contrast, decreased ballast life would not be considered an advantage. In fact, managing heat typically leads to the opposite – an increase in ballast life. Effective heat removal helps prevent overheating, which is a common cause of early ballast failure. Thus, the correct choice identifies that decreased ballast life is not an advantage of heat removal luminaires.