Which of the following is NOT a health and safety hazard in computer rooms?

The selection of bad lighting as not being a health and safety hazard in computer rooms can be understood in the context of the other options presented. While poor lighting may cause discomfort or eye strain, it does not typically pose the same immediate risks as electrical equipment, which can lead to shocks or fires, or food and drink spills, which can cause slips and falls. Heating issues can lead to overheating of equipment and uncomfortable work environments, potentially leading to more severe consequences. Therefore, while bad lighting is certainly not ideal for productivity and comfort, it does not represent a direct and significant health and safety hazard when compared to the other choices listed.