How should you maintain proper underground lighting?

• A. Only rely on natural light.
• B. Turn off all lights during all shifts.
• C. Use any available light source, even damaged fixtures, as long as it is bright enough.
• D. Use approved lighting, keep fixtures clean, replace failed bulbs promptly, and verify emergency lighting works.

Answer: (D)

Maintaining proper underground lighting means ensuring reliable, safe illumination by using lighting that is approved for mining work, keeping it clean and functional, and confirming that emergency lighting can be relied on when power is interrupted. In a mine, dust, moisture, and rough conditions can quickly reduce brightness, so regularly cleaning fixtures helps them perform at full output. When bulbs fail, replacing them promptly prevents dark areas where hazards or trips could occur. Emergency lighting must be tested and verified to work, so escape routes remain visible during an outage. These practices keep work areas, pathways, and exits well lit, support safe operations, and meet regulatory safety standards.