Besides the fact that injuries can cost quite a bit in terms of healthcare and disability costs, keeping workers healthy increases productivity in any kind of workplace. Human health is bound up in many factors, not the least of which is psychological. That is why this time of year, health and safety departments need to take into account the effect that lighting and weather have on workforces.

Seasonal affective disorder (SAD) is beginning to play a role in the way that people live their lives. Now that daylight savings has come and gone, there is less sunlight during the day and people are confined to the indoors significantly more. This can lead to added stress, anxiety, fatigue and ultimately lower productivity. Employers need to make sure that they can address these issues.

Besides providing ergonomically sound equipment, safety departments should also consider the role that light plays. Harsh fluorescent light is no one's favorite way to see, but even standard incandescent bulbs don't provide everything that people need to feel healthy. Instead, consider using full-spectrum light bulbs. These items release light in the same wavelengths that the sun does and can improve the mood and character of even the grumpiest of winter workers.